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TR Harris Books in Order

Browse George Wier's books with T.R. Harris in order, with short summaries, collaboration background, and a clear place to start.

Last updated: 29 new books added

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TR Harris books in publication order

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84 books

The Fringe Worlds

by TR Harris

2011

Abducted from Earth, ex-Navy SEAL Adam Cain wakes in an alien galaxy where humans are the physically superior species. Stranded, angry, and far from home, he teams with fringe-world operators and starts making trouble fast.

Alien Assassin

by TR Harris

2012

To survive in a hostile galaxy, Adam turns his superhuman edge into contract work and links up again with Riyad Tarazi. Assassins, criminals, and hidden alien manipulators make every job more dangerous than it looks.

The Tactics of Revenge

by TR Harris

2012

Adam and his raiders wage insurgency while the Human fleet prepares open war. As the Klin's hidden interference comes into the light, Adam is pushed toward a direct showdown with the powers behind the conflict.

The War of Pawns

by TR Harris

2012

Adam fights his way back toward Earth only to learn humanity has been played by the Klin. With both Juireans and Klin in the mix, personal revenge becomes a much wider war.

Cain's Crusaders

by TR Harris

2013

Adam takes command of a covert team used for the jobs no one else will touch. Their latest mission, rescuing the mysterious Arieel Bol, gets even worse once a fortune is placed on their heads.

The Apex Predator

by TR Harris

2013

Humanity's enemies answer a bounty with a devastating strike on Earth. While Adam and Sherri scramble to help defend the planet, Riyad heads into deadly territory to uncover the Kracori homeworld.

The Legend of Earth

by TR Harris

2013

Facing execution before the Juirean leader, Adam tries to prove humans are not the real enemy. Then the Kracori attack and turn a fragile revelation into a much larger crisis.

A Galaxy to Conquer

by TR Harris

2014

The Milky Way's great powers converge on Elision for a war that could wipe out whole species. Adam races into the middle of it, trying to save Riyad before the fleets finish what they started.

No Bones in Ice Cream

by TR Harris

2014

A rare standalone from Harris, this offbeat novel leaves starships behind for a more grounded story with dark humor, awkward truths, and the sense that ordinary life can turn strange in a hurry.

The Enclaves of Sylox

by TR Harris

2014

Former Army Ranger Jason King now sells homes on Sylox, until a stolen sacred artifact and a wave of conspiracy pull him back into action. To save Earth, he has to stop a galactic war between client meetings.

The Masters of War

by TR Harris

2014

Chasing Nigel McCarthy into another galaxy, Adam loses his ship and walks into a new struggle for power. Old enemies, stolen technology, and cross-galactic war turn the hunt into something much bigger.

Day of the Drone

by TR Harris

2015

A new kind of war begins when machines take over the front line. Harris turns remote combat into a tense military thriller about speed, control, and what happens when the weapons start outrunning the people.

Prelude to War

by TR Harris

2015

Adam, Riyad, and Sherri run straight into a mutant mastermind and an invading horde from another universe. Even old enemies must unite as the Milky Way realizes it has only seen the opening move.

The Unreachable Stars

by TR Harris

2015

When Panur seeks refuge with Adam, the entire galaxy is offered safety in exchange for handing him over. Adam refuses, then spends the book outrunning governments, fleets, and anyone willing to cash in.

A Clash of Aliens

by TR Harris

2016

With Adam trapped in the Sol-Kor universe, Riyad tries to find Panur and mount an impossible rescue. Alliances shift, enemies interfere, and Adam searches for his own way out before the cost gets even higher.

Alien Games

by TR Harris

2016

Peace does not last. New invaders from Andromeda and an ancient hidden power force Adam's team into a deadly contest over which species gets to survive.

Battlelines

by TR Harris

2016

The war inside the Sol-Kor universe finally erupts, and Adam's team must stop J'nae from mass-producing trans-dimensional warships. Giant fleet battles rage while Adam fights to keep the enemy from turning one victory into total domination.

Scorched Earth

by TR Harris

2016

Adam has been pushed past patience and into all-out retaliation. What follows is a bruising revenge campaign full of hard fights, political fallout, and the sense that victory may cost more than anyone wants to pay.

The Copernicus Deception

by TR Harris

2016

A trip to help friends on Visidor unravels into a corporate conspiracy with galactic consequences. Adam, Riyad, Sherri, and the slippery Copernicus Smith chase a secret that could restart war on a far worse scale.

An old friend pulls Jason into a hunt for the legendary Galactic Lights, treasures with the power to destroy worlds. If he can recover them and get them safely to Sylox, he may save Earth and finally win something for himself too.

Given a chance to end the Sol-Kor war at its source, Adam and Riyad cross into another universe to kill the queen. It is a desperate mission with no easy way home and failure measured in trillions of lives.

Force of Gravity

by TR Harris

2017

As the Klin keep rolling forward, Adam turns to Panur and Lila for a way to stop them. Enemy fleets are only part of the problem, because frightened politicians may be just as dangerous.

Invasion Force

by TR Harris

2017

The Klin return in the open with killer robots, unstoppable warships, and a plan to finish the galaxy for good. Adam is one of the few people who knows how dangerous they really are, and that makes him both target and hope.

Last Species Standing

by TR Harris

2017

After the destruction of Nuor, Adam and his teammates go from heroes to the most hunted people in the galaxy. With bounties everywhere, they strike back at the aliens funding the contract on their lives.

The Andromeda Mission

by TR Harris

2017

Adam and his crew make a one-way run to Andromeda to cut off the Nuorean threat at its source. It is a long-shot mission into unknown territory, with Earth and the Milky Way riding on the outcome.

The Cain Legacy

by TR Harris

2017

While Lila is taken by beings older and smarter than any current empire, Andromedan pressure keeps building across the galaxy. Adam's friends hunt for answers as the story opens new questions about humanity's deepest origins.

Mission Critical

by TR Harris

2018

Short on money and peace, Adam takes a job that sounds impossible even by his standards. Two close friends have stolen the deadliest weapon in the galaxy, and he has to catch them before everyone else does.

REV

by TR Harris

2018

Zac Murphy is the Corps' deadliest REV, a chemically enhanced Marine who keeps getting stronger when others burn out. His power makes him Earth's best weapon, and a growing problem for the people who built him.

REV: Rebirth

by TR Harris

2018

With the REV program mutating in ways no one planned, Zac fights to keep his people alive while Earth argues over what they should become. The next phase of the super-soldier story is already underway.

REV: Renegades

by TR Harris

2018

After a mission goes disastrously wrong, Zac Murphy and his team become hunted outcasts across the Grid. Clearing their names means exposing the lie at the heart of the REV program.

REV: Revolution

by TR Harris

2018

As aliens press the war and humans fight over the future of the REVs, Zac Murphy is pulled into a struggle over the next step in Human evolution. The battlefield is political now, as well as military.

The Immortal War

by TR Harris

2018

Kracion is closing in on godlike power, and Adam has to beat him to the lost Aris world that may decide everything. Massive fleet action and a personal race against time drive this chapter of the war.

The Lost Universe

by TR Harris

2018

A paid rescue mission in another universe promises huge rewards and almost no straight answers. Adam soon learns the job is bigger, stranger, and far more dangerous than the people who hired him admitted.

Destroyer of Worlds

by TR Harris

2019

Kracion is back, turning whole worlds into rubble, and Adam Cain is caught in a brutal chess match between ancient superpowers. Massive fleet battles and desperate gambits push the galaxy toward ruin.

Phantoms

by TR Harris

2019

What starts as a quick rescue on dangerous Sasin becomes the opening move in Adam Cain's strangest war yet. Ancient enemies stir, phantom forces surface, and Adam and Summer discover unsettling new powers.

REV: Retribution

by TR Harris

2019

Defeat by the Antaere drives Earth’s forces back to the Solar System, leaving humanity vulnerable to a final attack. Captain Zac Murphy and his enhanced REV warriors must defend the planet with a severely weakened military.

Terminus Rising

by TR Harris

2019

With Te'moc closing in and the universe itself under strain, Adam's team races to stop a disaster no one fully understands. At the same time, long-buried truths about Panur, the Aris, and the Sol-Kor finally come to light.

The Dead Worlds

by TR Harris

2019

Adam, Sherri, and Riyad try to run a bar in the lawless Dead Zone until stolen prototype weapons make them prime suspects. To survive, they have to clear their names and remind everyone why humans are dangerous.

The Last Aris

by TR Harris

2019

The only chance to save the universe may rest with the imprisoned Kracion, the last Aris anyone can find. Adam has one final sprint ahead of him, with Te'moc, the Sol-Kor, and his own darker impulses closing in.

Battle Plan

by TR Harris

2020

A missing fugitive, a stolen planetary fortune, and Copernicus Smith all point to a hidden scheme with galaxy-wide consequences. Adam dives into a treasure hunt that is really a race to stop the next big threat.

Children of the Aris

by TR Harris

2020

Freed from a quantum prison, the long-lost Children of the Aris want to rebuild their race at everyone else's expense. After Panur and Lila are kidnapped, Adam is thrown into his most urgent and personal chase yet.

Dark Energy

by TR Harris

2020

The ancient service module Kanan begins a drive for galactic domination, and only Adam's scattered circle can push back. Panur and Lila return just in time to make the battle even stranger and bigger.

Empires

by TR Harris

2020

A peace conference at Capt. Cain's Bar & Grill ends in assassination and a setup. Adam and the other humans on Liave-3 must find the real killer before the galaxy decides they started the war.

Galactic Vortex

by TR Harris

2020

The Gracilians arrive with dark-energy warships and old ties to the Aris, aiming to seize the Dead Worlds and beyond. Adam and his friends are forced into another high-stakes fight over ancient power.

REV: Resolve

by TR Harris

2020

A super-race appears in the Outer Reaches just after Zac Murphy and Angus Price are pushed aside. To survive, Humanity needs Zac's leadership and Dr. Cross's new generation of REVs, whether that alliance can be trusted or not.

REV: Revelations

by TR Harris

2020

After the Antaere war, Earth's empire pushes beyond the Grid and uses the REVs as its hammer. Zac never wanted command, but expansion, coercion, and new enemies leave him carrying the burden anyway.

The Formation Code

by TR Harris

2020

Adam holds a disk that may unlock the greatest power in the universe, the Formation itself. If he and the mutants cannot break the code first, someone else may learn how to create life, or destroy it.

The Quantum Enigma

by TR Harris

2020

Bank robberies, hidden scandals, and old enemies drag Adam and Riyad into a mystery that reaches far beyond the Dead Zone. The solution points to a foe with technology even the Aris would have feared.

Universal Law

by TR Harris

2020

Now serving as a marshal in the Dead Zone, Adam tries to bring order to the least orderly place in space. Politics, killers, alien beasts, and new covert assignments quickly make that impossible.

Raiders of the Shadow

by TR Harris

2021

Copernicus Smith stumbles into a conspiracy so big he can barely describe it before he is captured. Adam and the gang race to find him, only to realize the threat is larger than any of them guessed.

REV: Requiem

by TR Harris

2021

Captured far from Earth, Zac becomes a trophy for the enemy while the shattered Human fleet runs for space. With superior races closing in, rescue and survival both start looking almost impossible.

Secondary Protocol

by TR Harris

2021

Earth is back in the Klin's sights, this time through infiltration and deadly implanted tech. Adam and Copernicus uncover the plot and race to stop a takeover from the inside out.

War of Attrition

by TR Harris

2021

The Klin return with a new plan for domination, mental control on a galactic scale. Adam and his allies must fight an invisible army before whole worlds stop being able to think for themselves.

Allied Command

by TR Harris

2022

Kracion returns on the side of the allies, which would be comforting if he were not Kracion. Adam must use the mad Aris to stop the Klin's reality-tearing fleet before the war wrecks space itself.

Battle Formation

by TR Harris

2022

With the Klin close to victory, a restored young Adam leads a last-ditch, multi-front attack to save Earth and the galaxy. The plan is strong, but a traitor inside the allied camp could break it.

Devil's Gate

by TR Harris

2022

Adam Cain and his companions accept a job robbing a Klin bank behind enemy lines. With previous assignments leaving them in debt, an enormous reward promises relief, but the mission brings dangers their employers have concealed.

Human for Hire

by TR Harris

2022

Hiding his famous identity, Adam Cain sells his skills as a bounty hunter and mercenary in a fractured galaxy. Assignments presented as simple recoveries become deadly confrontations when clients conceal what they are really asking him to do.

Adam wants a break, but unsettling events in a region called the Shadow drag him into another mystery. The threat building there may be the largest one the Legacy books have faced.

Soldier of Fortune

by TR Harris

2022

A client betrays Adam Cain during a coup, leaving his team hunted by killer robots with no way off the planet. A later partnership with another bounty hunter adds further revenge and deception to his troubles.

Armies of the Sun

by TR Harris

2023

A radical sect kidnaps religious leader Arieel Bol, Adam Cain’s former lover and the mother of his daughter. With her public execution approaching, Adam must find the captors and stop a campaign already claiming other leaders.

Cellblock Orion

by TR Harris

2023

Convicted of murder after a brief alien trial, Adam Cain receives a life sentence in Malx Prison. Among inmates abandoned to govern themselves, he must use his experience and unusual human strength to find a way out.

Frontier Justice

by TR Harris

2023

Adam Cain accepts an apparently straightforward assignment protecting settlers from alien marauders. When the attackers refuse to retreat, his sympathy for the threatened community turns a routine mercenary contract into a fight for their survival.

REV: Rebellion

by TR Harris

2023

Tensions grow between ordinary humans and the enhanced REV warriors created to defend them. Zac Murphy and Angus Price confront mistrust on both sides as a new alien threat raises the question of whether the REVs will fight again.

Sirius Cargo

by TR Harris

2023

A weapons delivery leads Adam Cain to transport a mysterious package containing a feline mutant named Siri. Pursued by rival warlords, they race across Ellios, trying to survive and end a war devastating the planet.

Starship Andromeda

by TR Harris

2023

Adam Cain takes John Martinez toward Earth aboard the luxury liner Starship Andromeda, hoping to challenge the false history he learned from the Klin. A deadly conspiracy threatens everyone aboard and the world they are approaching.

The Methuselah Paradox

by TR Harris

2023

A billionaire’s pursuit of immortality turns a medicine that cures disease into a weapon threatening humanity. A disabled father and a CDC epidemiologist race to stop a stolen drug before its devastating effects spread worldwide.

Capella Prime

by TR Harris

2024

Riding aboard a prisoner transport, Adam Cain finds himself caught in a violent hijacking. With help from Penny Jacobs, he must face dangerous inmates, stolen spacecraft, and hostile creatures while trying to survive the interrupted journey.

Earth Blood

by TR Harris

2024

Adam Cain’s identity and resurrection become public knowledge, attracting a secret sect determined to seize immortality. As his friends mount a rescue, other interested forces converge, turning his exposed past into a danger across the galaxy.

I Am Entropy

by TR Harris

2024

Adam Cain abandons restraint when a new provocation drives him into a campaign of vengeance. His pursuit brings chaos to an established order, threatening worlds as the mercenary’s usual collateral destruction becomes a deliberate objective.

Operation Antares

by TR Harris

2024

An enemy seeking revenge for Adam Cain’s past actions turns the mercenary into a target. As pursuit becomes a shifting contest between hunter and hunted, Adam must confront adversaries whose memories outlast his completed assignments.

REV: Resurrection

by TR Harris

2024

Exiled REV warriors build a new home on Crious while Earth faces an invasion by the Seken. Zac Murphy must decide whether his people will defend the humans who rejected them or accept the invaders’ offer of neutrality.

Stellar Whirlwind

by TR Harris

2024

No local authority will accept Adam Cain’s latest prisoner, forcing him to transport the fugitive across the galaxy. Repeated attacks and concealed motives push captor and captive toward an uneasy alliance as they struggle to stay alive.

Codename: ATLAS

by TR Harris

2025

Cyborg Alan Ashe is ordered to win humanity’s war against the Azincor, apparently single-handedly. Carrying memories his creators expected to erase, he faces an impossible assignment while questioning the people who made him a weapon.

Lethal Alien

by TR Harris

2025

Adam Cain is assigned to train Starfire Security’s new human bounty hunter, Benjamin Frost. The younger recruit’s impulsive confidence creates dangerous complications, forcing Adam to teach him how the galaxy works while keeping them both alive.

Seek & Destroy

by TR Harris

2025

An alien-crewed human starship carries a deadly toxin toward Earth. Cyborg Alan Ashe must intercept it, but his alien appearance makes him a target for the human forces he is trying to protect.

The Last Cyborg

by TR Harris

2025

Marine Alan Ashe dies, then awakens with his brain inside a powerful mechanical body. Unlike other cyborgs, he remembers his former life and death, raising dangerous questions about his creation amid humanity’s war with aliens.

The Raptor

by TR Harris

2025

Adam Cain leads a security team to an isolated research facility that has stopped communicating. What appears to be another well-paid assignment becomes a struggle to survive when a deadly unknown presence begins hunting him.

New

Against the Wind

by TR Harris

2026

The UPE president sends Jonathan Carr and Bondel Drake on a rescue mission inside Vonish territory. What they uncover turns the assignment into a struggle over secrets that could either save the UPE or destroy it.

New

Captain Shadow

by TR Harris

2026

Former Navy officer Jonathan Carr uses a salvaged ship to secretly liberate worlds in the occupied Reaches. As he uncovers a conspiracy involving Earth’s allies and enemies, pursuit from both sides threatens his covert campaign.

New

Adam Cain returns to enlist Benjamin Frost against an ancient enemy from his past. The two gather familiar alien fighters and powerful mutants, seeking a way to defeat an opponent beyond the reach of conventional force.

New

Half-Life

by TR Harris

2026

War against the Tarkis drives a race for dark-matter weapons, while Alan Ashe takes on another infiltration mission. His body’s translation technology begins eroding his identity, leaving him uncertain how much of his humanity survives.

New

The Chameleon

by TR Harris

2026

Alan Ashe’s removable brain module lets him inhabit human and alien bodies, making him an extraordinary infiltrator. Each assignment demands unfamiliar skills, and limited time in his borrowed identities threatens to expose the cyborg spy.

New

Unsanctioned Action

by TR Harris

2026

Benjamin Frost secretly pursues an unprecedented bounty, hoping to impress his employers at Starfire Security. His attempt unleashes trouble across the galaxy, leaving Adam Cain to repair the damage before Frost’s ambition destroys the company.

New

Winds of Freedom

by TR Harris

2026

Jonathan Carr is trapped behind enemy lines with a weapons shipment he must deliver home. Meanwhile, a devastating Vonish weapon tears through UPE forces, bringing the threat of annihilation ever closer to Earth.

Where to start with TR Harris

If you want the main Adam Cain story: The Fringe Worlds → Alien Assassin → The War of Pawns
If you want a later, easier on-ramp: The Dead Worlds → Empires → Battle Plan
If you want military sci-fi first: REV → REV: Renegades → REV: Rebirth
If you want a side adventure away from Adam: The Enclaves of Sylox → Treasure of the Galactic Lights

Drone Wars books in order

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  1. Book cover for "Day of the Drone"

    Day of the Drone

    by TR Harris

    2015Drone Wars, Book 1

Drone Wars books in chronological order

  1. Book cover for "Day of the Drone"

    Day of the Drone

    by TR Harris

    2015Drone Wars, Book 1

Jason King: Agent to the Stars books in order

Explore this series
  1. Book cover for "The Enclaves of Sylox"

    The Enclaves of Sylox

    by TR Harris

    2014Jason King: Agent to the Stars, Book 1
  2. Book cover for "Treasure of the Galactic Lights"

    Treasure of the Galactic Lights

    by TR Harris

    2016Jason King: Agent to the Stars, Book 2

Jason King: Agent to the Stars books in chronological order

  1. Book cover for "The Enclaves of Sylox"

    The Enclaves of Sylox

    by TR Harris

    2014Jason King: Agent to the Stars, Book 1
  2. Book cover for "Treasure of the Galactic Lights"

    Treasure of the Galactic Lights

    by TR Harris

    2016Jason King: Agent to the Stars, Book 2

REV Warriors books in order

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  1. Book cover for "REV"

    REV

    by TR Harris

    2018REV Warriors, Book 1
  2. Book cover for "REV: Rebirth"

    REV: Rebirth

    by TR Harris

    2018REV Warriors, Book 3
  3. Book cover for "REV: Renegades"

    REV: Renegades

    by TR Harris

    2018REV Warriors, Book 2
  4. Book cover for "REV: Revolution"

    REV: Revolution

    by TR Harris

    2018REV Warriors, Book 4
  5. Book cover for "REV: Retribution"

    REV: Retribution

    by TR Harris

    2019
  6. Book cover for "REV: Resolve"

    REV: Resolve

    by TR Harris

    2020REV Warriors Part 2, Book 2
  7. Book cover for "REV: Revelations"

    REV: Revelations

    by TR Harris

    2020REV Warriors Part 2, Book 1
  8. Book cover for "REV: Requiem"

    REV: Requiem

    by TR Harris

    2021REV Warriors Part 2, Book 3
  9. Book cover for "REV: Rebellion"

    REV: Rebellion

    by TR Harris

    2023
  10. Book cover for "REV: Resurrection"

    REV: Resurrection

    by TR Harris

    2024

REV Warriors books in chronological order

  1. Book cover for "REV"

    REV

    by TR Harris

    2018REV Warriors, Book 1
  2. Book cover for "REV: Renegades"

    REV: Renegades

    by TR Harris

    2018REV Warriors, Book 2
  3. Book cover for "REV: Rebirth"

    REV: Rebirth

    by TR Harris

    2018REV Warriors, Book 3
  4. Book cover for "REV: Revolution"

    REV: Revolution

    by TR Harris

    2018REV Warriors, Book 4

REV Warriors Part 2 books in order

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  1. Book cover for "REV: Resolve"

    REV: Resolve

    by TR Harris

    2020REV Warriors Part 2, Book 2
  2. Book cover for "REV: Revelations"

    REV: Revelations

    by TR Harris

    2020REV Warriors Part 2, Book 1
  3. Book cover for "REV: Requiem"

    REV: Requiem

    by TR Harris

    2021REV Warriors Part 2, Book 3

REV Warriors Part 2 books in chronological order

  1. Book cover for "REV: Revelations"

    REV: Revelations

    by TR Harris

    2020REV Warriors Part 2, Book 1
  2. Book cover for "REV: Resolve"

    REV: Resolve

    by TR Harris

    2020REV Warriors Part 2, Book 2
  3. Book cover for "REV: Requiem"

    REV: Requiem

    by TR Harris

    2021REV Warriors Part 2, Book 3

The Adam Cain Chronicles books in order

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  1. Book cover for "The Dead Worlds"

    The Dead Worlds

    by TR Harris

    2019The Adam Cain Chronicles, Book 1
  2. Book cover for "Battle Plan"

    Battle Plan

    by TR Harris

    2020The Adam Cain Chronicles, Book 3
  3. Book cover for "Children of the Aris"

    Children of the Aris

    by TR Harris

    2020The Adam Cain Chronicles, Book 9
  4. Book cover for "Dark Energy"

    Dark Energy

    by TR Harris

    2020The Adam Cain Chronicles, Book 5
  5. Book cover for "Empires"

    Empires

    by TR Harris

    2020The Adam Cain Chronicles, Book 2
  6. Book cover for "Galactic Vortex"

    Galactic Vortex

    by TR Harris

    2020The Adam Cain Chronicles, Book 4
  7. Book cover for "The Formation Code"

    The Formation Code

    by TR Harris

    2020The Adam Cain Chronicles, Book 7
  8. Book cover for "The Quantum Enigma"

    The Quantum Enigma

    by TR Harris

    2020The Adam Cain Chronicles, Book 8
  9. Book cover for "Universal Law"

    Universal Law

    by TR Harris

    2020The Adam Cain Chronicles, Book 6

The Adam Cain Chronicles books in chronological order

  1. Book cover for "The Dead Worlds"

    The Dead Worlds

    by TR Harris

    2019The Adam Cain Chronicles, Book 1
  2. Book cover for "Empires"

    Empires

    by TR Harris

    2020The Adam Cain Chronicles, Book 2
  3. Book cover for "Battle Plan"

    Battle Plan

    by TR Harris

    2020The Adam Cain Chronicles, Book 3
  4. Book cover for "Galactic Vortex"

    Galactic Vortex

    by TR Harris

    2020The Adam Cain Chronicles, Book 4
  5. Book cover for "Dark Energy"

    Dark Energy

    by TR Harris

    2020The Adam Cain Chronicles, Book 5
  6. Book cover for "Universal Law"

    Universal Law

    by TR Harris

    2020The Adam Cain Chronicles, Book 6
  7. Book cover for "The Formation Code"

    The Formation Code

    by TR Harris

    2020The Adam Cain Chronicles, Book 7
  8. Book cover for "The Quantum Enigma"

    The Quantum Enigma

    by TR Harris

    2020The Adam Cain Chronicles, Book 8
  9. Book cover for "Children of the Aris"

    Children of the Aris

    by TR Harris

    2020The Adam Cain Chronicles, Book 9

The Human Chronicles books in order

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  1. Book cover for "The Fringe Worlds"

    The Fringe Worlds

    by TR Harris

    2011The Human Chronicles, Book 1
  2. Book cover for "Alien Assassin"

    Alien Assassin

    by TR Harris

    2012The Human Chronicles, Book 2
  3. Book cover for "The Tactics of Revenge"

    The Tactics of Revenge

    by TR Harris

    2012The Human Chronicles, Book 4
  4. Book cover for "The War of Pawns"

    The War of Pawns

    by TR Harris

    2012The Human Chronicles, Book 3
  5. Book cover for "Cain's Crusaders"

    Cain's Crusaders

    by TR Harris

    2013The Human Chronicles, Book 6
  6. Book cover for "The Apex Predator"

    The Apex Predator

    by TR Harris

    2013The Human Chronicles, Book 7
  7. Book cover for "The Legend of Earth"

    The Legend of Earth

    by TR Harris

    2013The Human Chronicles, Book 5
  8. Book cover for "A Galaxy to Conquer"

    A Galaxy to Conquer

    by TR Harris

    2014The Human Chronicles, Book 8
  9. Book cover for "The Masters of War"

    The Masters of War

    by TR Harris

    2014The Human Chronicles, Book 9
  10. Book cover for "Prelude to War"

    Prelude to War

    by TR Harris

    2015The Human Chronicles, Book 10
  11. Book cover for "The Unreachable Stars"

    The Unreachable Stars

    by TR Harris

    2015The Human Chronicles, Book 11
  12. Book cover for "A Clash of Aliens"

    A Clash of Aliens

    by TR Harris

    2016The Human Chronicles, Book 13
  13. Book cover for "Alien Games"

    Alien Games

    by TR Harris

    2016The Human Chronicles, Book 17
  14. Book cover for "Battlelines"

    Battlelines

    by TR Harris

    2016The Human Chronicles, Book 14
  15. Book cover for "Scorched Earth"

    Scorched Earth

    by TR Harris

    2016The Human Chronicles, Book 16
  16. Book cover for "The Copernicus Deception"

    The Copernicus Deception

    by TR Harris

    2016The Human Chronicles, Book 15
  17. Book cover for "When Earth Reigned Supreme"

    When Earth Reigned Supreme

    by TR Harris

    2016The Human Chronicles, Book 12
  18. Book cover for "Force of Gravity"

    Force of Gravity

    by TR Harris

    2017The Human Chronicles, Book 22
  19. Book cover for "Invasion Force"

    Invasion Force

    by TR Harris

    2017The Human Chronicles, Book 21
  20. Book cover for "Last Species Standing"

    Last Species Standing

    by TR Harris

    2017The Human Chronicles, Book 20
  21. Book cover for "The Andromeda Mission"

    The Andromeda Mission

    by TR Harris

    2017The Human Chronicles, Book 19
  22. Book cover for "The Cain Legacy"

    The Cain Legacy

    by TR Harris

    2017The Human Chronicles, Book 18
  23. Book cover for "Mission Critical"

    Mission Critical

    by TR Harris

    2018The Human Chronicles, Book 23
  24. Book cover for "The Immortal War"

    The Immortal War

    by TR Harris

    2018The Human Chronicles, Book 25
  25. Book cover for "The Lost Universe"

    The Lost Universe

    by TR Harris

    2018The Human Chronicles, Book 24
  26. Book cover for "Destroyer of Worlds"

    Destroyer of Worlds

    by TR Harris

    2019The Human Chronicles, Book 26
  27. Book cover for "Phantoms"

    Phantoms

    by TR Harris

    2019The Human Chronicles, Book 27
  28. Book cover for "Terminus Rising"

    Terminus Rising

    by TR Harris

    2019The Human Chronicles, Book 28
  29. Book cover for "The Last Aris"

    The Last Aris

    by TR Harris

    2019The Human Chronicles, Book 29

The Human Chronicles books in chronological order

  1. Book cover for "The Fringe Worlds"

    The Fringe Worlds

    by TR Harris

    2011The Human Chronicles, Book 1
  2. Book cover for "Alien Assassin"

    Alien Assassin

    by TR Harris

    2012The Human Chronicles, Book 2
  3. Book cover for "The War of Pawns"

    The War of Pawns

    by TR Harris

    2012The Human Chronicles, Book 3
  4. Book cover for "The Tactics of Revenge"

    The Tactics of Revenge

    by TR Harris

    2012The Human Chronicles, Book 4
  5. Book cover for "The Legend of Earth"

    The Legend of Earth

    by TR Harris

    2013The Human Chronicles, Book 5
  6. Book cover for "Cain's Crusaders"

    Cain's Crusaders

    by TR Harris

    2013The Human Chronicles, Book 6
  7. Book cover for "The Apex Predator"

    The Apex Predator

    by TR Harris

    2013The Human Chronicles, Book 7
  8. Book cover for "A Galaxy to Conquer"

    A Galaxy to Conquer

    by TR Harris

    2014The Human Chronicles, Book 8
  9. Book cover for "The Masters of War"

    The Masters of War

    by TR Harris

    2014The Human Chronicles, Book 9
  10. Book cover for "Prelude to War"

    Prelude to War

    by TR Harris

    2015The Human Chronicles, Book 10
  11. Book cover for "The Unreachable Stars"

    The Unreachable Stars

    by TR Harris

    2015The Human Chronicles, Book 11
  12. Book cover for "When Earth Reigned Supreme"

    When Earth Reigned Supreme

    by TR Harris

    2016The Human Chronicles, Book 12
  13. Book cover for "A Clash of Aliens"

    A Clash of Aliens

    by TR Harris

    2016The Human Chronicles, Book 13
  14. Book cover for "Battlelines"

    Battlelines

    by TR Harris

    2016The Human Chronicles, Book 14
  15. Book cover for "The Copernicus Deception"

    The Copernicus Deception

    by TR Harris

    2016The Human Chronicles, Book 15
  16. Book cover for "Scorched Earth"

    Scorched Earth

    by TR Harris

    2016The Human Chronicles, Book 16
  17. Book cover for "Alien Games"

    Alien Games

    by TR Harris

    2016The Human Chronicles, Book 17
  18. Book cover for "The Cain Legacy"

    The Cain Legacy

    by TR Harris

    2017The Human Chronicles, Book 18
  19. Book cover for "The Andromeda Mission"

    The Andromeda Mission

    by TR Harris

    2017The Human Chronicles, Book 19
  20. Book cover for "Last Species Standing"

    Last Species Standing

    by TR Harris

    2017The Human Chronicles, Book 20
  21. Book cover for "Invasion Force"

    Invasion Force

    by TR Harris

    2017The Human Chronicles, Book 21
  22. Book cover for "Force of Gravity"

    Force of Gravity

    by TR Harris

    2017The Human Chronicles, Book 22
  23. Book cover for "Mission Critical"

    Mission Critical

    by TR Harris

    2018The Human Chronicles, Book 23
  24. Book cover for "The Lost Universe"

    The Lost Universe

    by TR Harris

    2018The Human Chronicles, Book 24
  25. Book cover for "The Immortal War"

    The Immortal War

    by TR Harris

    2018The Human Chronicles, Book 25
  26. Book cover for "Destroyer of Worlds"

    Destroyer of Worlds

    by TR Harris

    2019The Human Chronicles, Book 26
  27. Book cover for "Phantoms"

    Phantoms

    by TR Harris

    2019The Human Chronicles, Book 27
  28. Book cover for "Terminus Rising"

    Terminus Rising

    by TR Harris

    2019The Human Chronicles, Book 28
  29. Book cover for "The Last Aris"

    The Last Aris

    by TR Harris

    2019The Human Chronicles, Book 29

The Human Chronicles Legacy books in order

Explore this series
  1. Book cover for "Raiders of the Shadow"

    Raiders of the Shadow

    by TR Harris

    2021The Human Chronicles Legacy, Book 1
  2. Book cover for "Secondary Protocol"

    Secondary Protocol

    by TR Harris

    2021The Human Chronicles Legacy, Book 3
  3. Book cover for "War of Attrition"

    War of Attrition

    by TR Harris

    2021The Human Chronicles Legacy, Book 2
  4. Book cover for "Allied Command"

    Allied Command

    by TR Harris

    2022The Human Chronicles Legacy, Book 6
  5. Book cover for "Battle Formation"

    Battle Formation

    by TR Harris

    2022The Human Chronicles Legacy, Book 5
  6. Book cover for "Lifeforce: An Adam Cain Adventure"

    Lifeforce: An Adam Cain Adventure

    by TR Harris

    2022The Human Chronicles Legacy, Book 4

The Human Chronicles Legacy books in chronological order

  1. Book cover for "Raiders of the Shadow"

    Raiders of the Shadow

    by TR Harris

    2021The Human Chronicles Legacy, Book 1
  2. Book cover for "War of Attrition"

    War of Attrition

    by TR Harris

    2021The Human Chronicles Legacy, Book 2
  3. Book cover for "Secondary Protocol"

    Secondary Protocol

    by TR Harris

    2021The Human Chronicles Legacy, Book 3
  4. Book cover for "Lifeforce: An Adam Cain Adventure"

    Lifeforce: An Adam Cain Adventure

    by TR Harris

    2022The Human Chronicles Legacy, Book 4
  5. Book cover for "Battle Formation"

    Battle Formation

    by TR Harris

    2022The Human Chronicles Legacy, Book 5
  6. Book cover for "Allied Command"

    Allied Command

    by TR Harris

    2022The Human Chronicles Legacy, Book 6

Standalone TR Harris books

  1. Book cover for "No Bones in Ice Cream"

    No Bones in Ice Cream

    by TR Harris

    2014
  2. Book cover for "Devil's Gate"

    Devil's Gate

    by TR Harris

    2022
  3. Book cover for "Human for Hire"

    Human for Hire

    by TR Harris

    2022
  4. Book cover for "Soldier of Fortune"

    Soldier of Fortune

    by TR Harris

    2022
  5. Book cover for "Armies of the Sun"

    Armies of the Sun

    by TR Harris

    2023
  6. Book cover for "Cellblock Orion"

    Cellblock Orion

    by TR Harris

    2023
  7. Book cover for "Frontier Justice"

    Frontier Justice

    by TR Harris

    2023
  8. Book cover for "Sirius Cargo"

    Sirius Cargo

    by TR Harris

    2023
  9. Book cover for "Starship Andromeda"

    Starship Andromeda

    by TR Harris

    2023
  10. Book cover for "The Methuselah Paradox"

    The Methuselah Paradox

    by TR Harris

    2023
  11. Book cover for "Capella Prime"

    Capella Prime

    by TR Harris

    2024
  12. Book cover for "Earth Blood"

    Earth Blood

    by TR Harris

    2024
  13. Book cover for "I Am Entropy"

    I Am Entropy

    by TR Harris

    2024
  14. Book cover for "Operation Antares"

    Operation Antares

    by TR Harris

    2024
  15. Book cover for "Stellar Whirlwind"

    Stellar Whirlwind

    by TR Harris

    2024
  16. Book cover for "Codename: ATLAS"

    Codename: ATLAS

    by TR Harris

    2025
  17. Book cover for "Lethal Alien"

    Lethal Alien

    by TR Harris

    2025
  18. Book cover for "Seek & Destroy"

    Seek & Destroy

    by TR Harris

    2025
  19. Book cover for "The Last Cyborg"

    The Last Cyborg

    by TR Harris

    2025
  20. Book cover for "The Raptor"

    The Raptor

    by TR Harris

    2025
  21. Book cover for "Against the Wind"

    Against the Wind

    by TR Harris

    2026
  22. Book cover for "Captain Shadow"

    Captain Shadow

    by TR Harris

    2026
  23. Book cover for "Collateral Damage Included"
  24. Book cover for "Half-Life"

    Half-Life

    by TR Harris

    2026
  25. Book cover for "The Chameleon"

    The Chameleon

    by TR Harris

    2026
  26. Book cover for "Unsanctioned Action"

    Unsanctioned Action

    by TR Harris

    2026
  27. Book cover for "Winds of Freedom"

    Winds of Freedom

    by TR Harris

    2026

Author bio

T.R. Harris writes under the name T.R. Harris, but he also introduces himself simply as Tom Harris. Much of his fiction grows out of one energetic idea: if humans met the rest of the galaxy, we might turn out to be the species everyone else should worry about. That idea powers The Human Chronicles, the long Adam Cain adventure that became the center of his science fiction catalog.

It is a very T.R. Harris premise.

He has said the spark for that universe came from an old ad in Soldier of Fortune magazine, showing a hard-looking man standing over a dead monster. The image made him think about Human swagger, fearlessness, and what that attitude might look like in space. From there came Adam Cain, an ex-Navy SEAL ripped away from Earth and dropped into an alien universe where humans are stronger, faster, and tougher than almost everyone around them.

Adam does not take the situation quietly.

That setup gave Harris room to build a very large story. Across The Fringe Worlds, Alien Assassin, The War of Pawns, The Legend of Earth, and many later books, Adam grows from angry outsider to galaxy-shaking force. The series eventually stretched to 29 main books, then continued through follow-on runs such as The Dead Worlds, Raiders of the Shadow, and Lifeforce. Readers who stick with Harris usually come for the same mix every time: blunt humor, fast pacing, loyal teammates, and action that keeps getting bigger without losing its rough, lived-in feel.

He did not stop with Adam Cain. In REV, Harris moves into military science fiction with chemically enhanced Marines and the uneasy future they create. In The Enclaves of Sylox and its sequel, he takes a more sideways route into space opera by following Jason King, a former Army Ranger turned real estate broker on an alien world. Different setup, same instinct for momentum. He likes heroes who are competent, sarcastic, and one bad day away from a firefight.

Another thing readers tend to notice is that Harris likes to keep even large adventures grounded in ordinary reactions. In his own comments about the Adam Cain books, he talks about wanting characters who feel like real people, not polished space icons. His heroes get homesick, irritated, worn out, and scared. Then they keep going. That human texture helps explain why the wisecracks and banter matter as much as the fleet battles.

That mix keeps the books moving.

Over time Harris has kept expanding his catalog with later Adam Cain stories, military science fiction, and spin-off series that circle the same wider universe from different angles. Even when the cast changes, the core promise does not change much. He writes books that want to get in, get moving, and keep the reader one chapter away from the next bad decision.

What ties the whole body of work together is not one strict formula so much as a steady attitude. Clear stakes. Fast motion. A lot of pressure. And a strong belief that ordinary Human stubbornness can still mean something, even at the edge of space. If you like space opera with swagger, Harris knows exactly what lane he is driving in.

Edited by

Richard Reis

Software engineer whose passion for tracking book recommendations from podcasts inspired the creation of MRB.

Anurag Ramdasan

Lead investor at 3one4 Capital whose startup expertise and love for books helped shape MRB and its growth.

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