AG Riddle Books in Order
Browse all A.G. Riddle books in order, with series lists, summaries, background on his sci-fi worlds, and guidance on the best places to start reading.
Last updated: December 17, 2025
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Publication Order
11 books
Lost in Time
by AG Riddle
2022
When physicist Sam Anderson confesses to a murder he didn’t commit to save his daughter, he’s exiled 200 million years into the past by a time-travel device he helped build. In the present, Adeline races to unmask the real killer and find a way to bring him home.
The Extinction Trials
by AG Riddle
2021
After a reality-shifting event called the Change, six strangers wake up in an underground complex and are told they’re part of an experiment to restart humanity. As they explore the facility and the ruined world outside, they discover the true stakes are far stranger.
Winter World
by AG Riddle
2019
Earth is plunging into a sudden ice age, glaciers overrunning cities while nations fight for the last habitable ground. From the ISS and a secret prison cell, Emma Matthews and James Sinclair join a desperate mission to investigate a mysterious object near the sun.
The Solar War
by AG Riddle
2019
After surviving the Long Winter, James Sinclair and Emma Matthews hope to rebuild—until asteroids break from the Kuiper Belt and line up on a collision course with Earth. As the alien grid returns, humanity’s fractured survivors mount a final, costly defense.
The Lost Colony
by AG Riddle
2019
On the distant world Eos, humanity’s last refugees arrive to find the first colony mysteriously deserted. As James Sinclair investigates strange spheres buried across the planet, a new threat emerges and forces the settlers to question whether Eos is sanctuary or trap.
Pandemic
by AG Riddle
2017
An Ebola-like outbreak in Kenya pulls CDC epidemiologist Peyton Shaw into a race to contain a virus with a 95 percent fatality rate. As infections explode worldwide, she uncovers evidence that the pathogen is engineered—and part of a far larger conspiracy.
Genome
by AG Riddle
2017
The X1 pandemic has burned across the planet, but the so-called cure hides a sophisticated nanotech system that can control its hosts. Peyton Shaw hunts the people behind it, chasing clues from a sunken Arctic submarine to secrets encoded in human DNA.
The Atlantis World
by AG Riddle
2014
In the aftermath of the Atlantis Plague, Kate Warner and David Vale follow a trail of Atlantean technology from Earth into deep space. To save humanity, they must uncover who built the Atlantis World and what enemy it was hiding from.
Departure
by AG Riddle
2014
When Flight 305 crashes in the English countryside, its survivors discover they’ve landed in a transformed future. Five passengers hold the key to why they were taken—and must decide whether to restore the timeline or reshape it.
The Atlantis Plague
by AG Riddle
2013
A devastating new plague sweeps the globe, killing millions and altering the survivors’ DNA. Kate Warner races to find a cure while the Immari order tries to let the disease run, believing it will forge a controlled, improved human future.
The Atlantis Gene
by AG Riddle
2013
A geneticist studying autism in Jakarta is swept into a war when her therapy awakens a mysterious Atlantis Gene. As a secret cabal and a counterterrorism agent converge on her work, the race to stop an engineered extinction begins.
Where should I start?
If you love ancient-conspiracy sci-fi thrillers: The Atlantis Gene → The Atlantis Plague → The Atlantis World
If you want pandemic science thrillers with lab detail: Pandemic → Genome
If you’re in the mood for a big space-and-ice saga: Winter World → The Solar War → The Lost Colony
If you prefer standalone time-bending stories: Departure → Lost in Time → The Extinction Trials
Author bio
A.G. Riddle grew up in Boiling Springs, North Carolina, and later studied at UNC–Chapel Hill, where he launched his first internet company with a childhood friend.
For about a decade after college he built and ran online businesses, helping other founders get startups off the ground. The work was demanding and technical, but it also taught him how fast ideas can spread when they connect with people.
He eventually stepped away from startups to focus on writing, drafting a science‑fiction thriller that mixed history, genetics, and conspiracy—an experiment he expected only a few readers to see.
The Atlantis Gene appeared in 2013 and quickly found an audience. As the first volume in what became The Atlantis Plague and The Atlantis World, it launched the Origin Mystery trilogy, a series about human origins, ancient catastrophes, and the hidden forces steering evolution. The books went on to sell millions of copies and to be translated into dozens of languages.
Riddle followed that success with Departure, a time‑twisting thriller about the survivors of a crashed airliner who realize they have landed in a very different future. The novel let him lean further into big speculative ideas—time travel, alternate timelines, second chances—while still keeping the focus on ordinary people trying to make sense of impossible choices.
With Pandemic and Genome, the two books in The Extinction Files, he turned his attention to global outbreaks and biotechnology. Those novels dig into how agencies like the CDC and WHO might actually respond to a fast‑moving pathogen, then push the scenario into stranger territory with engineered viruses, nanotechnology, and a code buried in the human genome.
The Long Winter trilogy—beginning with Winter World and continuing in The Solar War and The Lost Colony—shifts the action to a near‑future ice age and a mysterious object in space. Across those books, Riddle explores first contact, survival in extreme environments, and the personal costs of trying to save a species, often through the partnership of scientist James Sinclair and astronaut Emma Matthews.
More recently, standalones like The Extinction Trials and Lost in Time have shown his fascination with closed environments, moral dilemmas, and the way families hold together under pressure. Whether he is writing about a frozen Earth, a secret lab, or a time‑exile machine, he tends to ground the speculative pieces in careful research and everyday details.
Riddle now writes full‑time and lives in Raleigh, North Carolina, with his family and an energetic dog. He still brings a builder’s mindset from his startup days to each new story, tinkering with timelines and big scientific what‑ifs until the puzzle finally clicks into place.
Edited by
Software engineer whose passion for tracking book recommendations from podcasts inspired the creation of MRB.
Lead investor at 3one4 Capital whose startup expertise and love for books helped shaped MRB and its growth.
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