Ian Douglas Books in Order

Imperial champion Dev Cameron is ordered to destroy an underground colony of Xenos and suppress unrest caused by the Empire's rule. Facing the prospect of nuclear annihilation, he questions whether obedience offers the only possible response to his orders.

Dev Cameron joins the military hoping to pilot a starship, but is assigned to a giant walking combat machine instead. Fighting the mysterious Xenophobes on Loki, he encounters information that could change humanity's understanding of its alien enemy.

Dev Cameron now commands forces for the young Confederation, but betrayal destroys its uneasy peace with the Empire. As Imperial rulers threaten New America, an extraordinary connection with an alien being offers a dangerous possibility for defending the rebellion.

Alien contact has transformed humanity, but the Hegemony develops technology that could crush the rebel Confederation. Meanwhile, Dev Cameron and the DalRiss detect an approaching force from deep space that threatens every form of life.

After the DalRiss unexpectedly attack the Hegemony, Dev Cameron and Katya Alessandro seek an alliance with them. Dev's altered consciousness may help bridge the gap, but understanding truly alien minds could prove harder than fighting them.

A vast machine intelligence called the Web consumes the galaxy without regard for the civilizations in its path. An alliance of human and alien societies must uncover its origins and purpose to find a way to resist.

In 2040, discoveries in a ruined Martian city threaten accepted accounts of humanity's origins. A small Marine expedition protects American scientists and interests as rival powers prepare to fight over secrets buried on the Red Planet.

War between the United Nations and an American-led alliance escalates as alien secrets emerge on the Moon. Those discoveries point to a threat beyond the solar system, while the UN considers a devastating way to end hostilities.

In 2067, an ancient artificial intelligence beneath Europa's ice could explain humanity's origins. Outnumbered American Marines defend it against a Chinese assault while rival nations compete for alien technology and warnings of greater danger emerge.

A research mission discovers humans enslaved on the distant planet Ishtar by descendants of an ancient alien empire. Earth's Marines undertake a ten-year voyage to free the captives, facing rulers determined to reclaim their former power.

Marines return to an Earth aged by twenty-one years during their interstellar expedition. As they prepare for further service, a detachment disappears during a mission through an ancient wormhole near Sirius, revealing a new threat.

Alien forces bombard Earth with asteroids while its defenders are scattered across the galaxy. As leaders consider retreat, General Garroway and his Marines prepare a counterattack using new technology and help from an unexpected alien ally.

Marines discover the hidden homeworld of the Xul after years of interstellar warfare. Their chance to strike a decisive blow faces opposition from an Earth that has forgotten the danger, complicating an already perilous military mission.

United Star Marines follow the trail of a vanished transport through an unexplored stargate. Their journey into an unknown galaxy may offer a way to defeat the Xul, an ancient alien power that nearly destroyed humanity.

General Garroway and his Marines awaken after centuries of suspended sleep to face a renewed galactic crisis. Political leaders need their fighting skills, but the soldiers must navigate a changed society and competing ambitions for power.

An alien empire advances toward Earth to prevent humanity from achieving technological transcendence. With the government divided, the commander of the star carrier America takes his fighters into enemy space in a desperate defense of human survival.

Human Marines face alien siege as Earth's government fractures under pressure. Admiral Alexander Koenig chooses to take the carrier America into unexplored space, hoping a surprise offensive can disrupt the enemy's advance toward the solar system.

Navy medic Elliot Carlyle travels with Bravo Company to Bloodworld, where religious colonists face a violent alien attack. His determination to save lives is tested as the Marines confront an enemy whose motives remain dangerously unclear.

Earth's leaders seek peace after a near-disastrous alien assault, but Admiral Koenig refuses to withdraw. Pursued by Confederation warships, he takes his battle group beyond human space to confront the mysterious power threatening humanity's technological future.

Navy medic Elliot Carlyle joins a reconnaissance mission to an ocean planet after its research colony falls silent. An alien warship waits above the world, while something beneath its ice threatens to make the investigation even deadlier.

Twenty years after a fragile alien truce, the captain of the star carrier America approaches a larger command. As that peace begins to unravel, he faces new responsibilities against an enemy humanity still barely understands.

President Koenig opposes surrender to the Sh'daar while humanity fights a civil war over its future. When powerful newcomers emerge through a wormhole, he must consider joining his alien enemies against a potentially greater threat.

An unidentified alien ship flees Earth's orbit as humanity negotiates with the Sh'daar. President Koenig follows the pursuit and learns the strangers can manipulate time, raising urgent questions about their destination and their intentions toward humankind.

An expedition to the Galactic Core sends Grayson St. Clair and his colony ship four billion years into the future. Seeking allies in a transformed universe, the surviving humans confront an enemy able to turn space itself into a weapon.

After an alien intelligence destroys a science facility, humanity prepares to fight it before Earth becomes its next target. Admiral Trevor Gray follows an AI’s guidance toward distant technology that might provide a weapon, despite orders directing him elsewhere.

Grayson St. Clair leads the isolated Tellus Ad Astra through unfamiliar space while facing a threat that devours civilizations. He must preserve order aboard a civilian colony ship and find a route back to the Milky Way.

Stripped of command after disobeying orders, Trevor Gray receives a new plan from the AI Konstantin. Traveling toward Deneb with the intelligence Bright Light, he seeks contact with aliens who might help humanity withstand a technologically superior enemy.

After witnessing a UFO attack during a North Korean mission, Navy SEAL Mark Hunter joins a secret agency allied with extraterrestrials. Leading soldiers across the stars, he confronts alien interference in human history and competing plans for Earth.

Admiral Trevor Gray takes the America through time and space to investigate humanity’s potential for Singularity. Hostile aliens, a secret fleet, and politicians opposing artificial intelligence threaten a mission seeking answers about survival in the distant past.

Mark Hunter’s military team investigates links between reptilian aliens and the Third Reich aboard the star carrier Hillenkoetter. A Nazi colony near Aldebaran reveals a scheme to enslave Earth, where compromised governments make resistance increasingly difficult.

The Saurians seek control of Earth through hidden bases, propaganda, and Nazi allies rather than open conquest. Commander Mark Hunter and his crew face an enemy manipulating human fears while pursuing its claim to the planet.