Military Space Opera

The Warmaster’s horde advances through the fire and ash of Terra's dying breaths, forcing the loyalists back to the Delphic Battlement—the very walls of the Sanctum Imperialis. Angron, Primarch of the World Eaters and Herald of Horus, has achieved immortality through annihilation—now he leads the armies of the damned in a wrathful tide, destroying all before them as the warp begins its poisonous corruption of Terra's very soil.

A great darkness has befallen the galaxy, and the armies of Chaos are rampant. To survive, humanity must retaliate and take back what they have lost. By the will of the reborn primarch, Roboute Guilliman, is the Indomitus Crusade launched - a military undertaking that eclipses all others in known history. From the Throneworld of Terra does the Avenging Son hurl his fleets, their mission the very salvation of mankind.

The Custodian Guard have stood watch over the Emperor's Palace on Terra since the foundation of the Imperium. Charged with protecting the Master of Mankind from all threats, within and without, their fearsome resolve is renowned throughout the galaxy, and their golden armour is the last thing that a would-be assassin or saboteur will ever see.

The third book in the New York Times bestselling Expanse series, Abaddon's Gate opens the door to the ruins of an alien gate network—and the crew of the Rocinante may hold the key to unlocking its secrets. Now a Prime Original series. For generations, the solar system—Mars, the Moon, the...

Phil Kelly continues his look at the life of Commander Farsight with his first campaign against the full might of the Imperium and shows how the T'au Empire's technological superiority fares against Imperial grit.

Titus Briggs is an Earth Defense soldier, a grunt, a decorated war hero—it's all he's ever known. So when a career-ending injury leaves him lying in a hospital bed, missing both legs, he struggles to accept his new reality. He can no longer walk, which means he can no longer fight. That is until a mysterious colonel arrives and offers Titus the opportunity to step into a new kind of war, a new kind of fight. To become a new kind of soldier. Mobile Combat Suits—MOCOMS—represent the next stage in human warfare. They enable soldiers to fight like never before.

In the midst of fighting a reignited war with the deadly Nimic, Lt. Commander Johnny Rangers of the Confederation of Aligned Planets is dragged into a rescue mission by mysterious agent Koya Nyrus. With his best friend’s life at stake, he finds himself on a restricted world full of secrets that could alter the course of the war. Meanwhile, Rangers’ father, Inspector Frank Branza of the Gravity City Police Force, sets out to uncover a vast conspiracy with plans to affect the very fabric of reality.

In the hellish sprawl of Imperial Terra, Ordo Hereticus Inquisitor Erasmus Crowl serves as a stalwart protector, for even the Throneworld is not immune to the predations of its enemies. In the course of his duty, Crowl becomes embroiled in a dark conspiracy, one that leads all the way to the halls of the Imperial Palace. As he plunges deeper into the shadowy underbelly of the many palace districts, his investigation attracts the attention of hidden forces, and soon he and his acolyte Spinoza are being hunted.

The discovery of an ancient alien pyramid buried under the ice in Antarctica changes Earth forever. We learn that we are the forgotten slaves of a galaxy spanning empire called the V'kit'no'sat who abandoned our planet 100,000 years ago during a massive rebellion. Our ancestors, the Zen'zat, were given special genetic powers and ordered never to reproduce under pain of death...for themselves and their offspring. That means Earth's entire population is illegal and if the V'kit'no'sat return to reclaim their lost border colony they'll wipe out every last one of us.

Ragnar Blackmane is unique among the Space Wolves in ascending to the Wolf Guard without ever being a Grey Hunter. But how did he manage such a feat? The beginnings of that story are told here. When the Spear of Russ, an ancient relic of the Space Wolves once wielded by Leman Russ himself, is stolen, the Chapter seeks its return on the world of Garm. But when the forces of Chaos ambush them, the enraged Space Wolves learn that there is more to the attack than they could have guessed, for an ancient enemy of the Chapter is prophesied to be reborn.

When Lieutenant Alex "Flex" Callahan encounters mysterious alien probes near Luna Station, no one believes his warnings—until it's too late. Human activity has awakened an alien presence deep in our Solar System. Now, humanity faces extinction as this ancient and forgotten foe launches a devastating invasion. Their goal? To reclaim Earth as their ancestral home. Flying his Firebird fighter from the carrier ECS Vanguard, Flex leads the desperate fight against overwhelming odds.

With over 10 million copies sold, The Expanse has become one of the biggest science fiction phenomenons of the decade. The sixth book in the New York Times bestselling Expanse series, Babylon's Ashes has the galaxy in full revolution and it's up to the crew of the Rocinante to make a desperate...

Years after defeating aliens bent on burning down the galaxy, the Interstellar Union is breaking apart, its member species undermining each other at every opportunity. When an interdimensional distress signal arrives, only humanity is interested in helping. Captain Vin Husher is given command of the UHS Relentless, and sent in as part of a carrier strike group...right into a trap laid by humanity’s old enemy. Surrounded by a bioengineered super-species and unable to return home, Husher must draw on decades of experience just to keep his people alive.

Following their successful escape from Androchida Prime’s capital city, Sir Chuck and the rest of the Phantoms find themselves mystified by unsettling news. The leader of the Blood Guard resistance, famed General Cordan, has defected to the AE. But while many doubt the veracity of the development, more pressing intel awaits: the empire is planning to invade the Sci-Rung home world.

Born to oppression, Siena is an ordinary young woman, until an act of defiance leaves her scarred and marked as a rebel. She's sold to Ero, a fallen Krey with a desperate plan to redeem his once-powerful family. He intends to enhance slaves by altering their genetic code, increasing their value through an illegal experiment.

The lines. No ship can traverse the void without them. Only linesmen can work with them. But only Ean Lambert hears their song. And everyone thinks he's crazy.... Most slum kids never go far, certainly not becoming a level 10 linesman like Ean. Even if he's part of a small and unethical cartel, and the other linesmen disdain his self-taught methods, he's certified and working. Then a mysterious alien ship is discovered at the edges of the galaxy.

Lieutenant Alex "Flex" Callahan watched helplessly as the first refugee ships fled Venus. Something was driving them mad, transforming both crew and vessels into horrors. But this was just the beginning. The mysterious alien menace that calls itself The Cure has arrived, threatening not only death and destruction but the monstrous and chilling corruption of humanity itself. While Flex works tirelessly to discover the true nature of The Cure, he is beset on all sides by doubters and enemies within.

For a decade, peace has reigned in interstellar space. A tripartite agreement between the Colonial Union, the Earth, and the alien Conclave has kept the forces of war at bay, even when some would have preferred to return to the fighting and struggle of former times. For now, more sensible heads have prevailed – and have even championed unity. But now, there is a new force that threatens the hard-maintained peace: The Consu, the most advanced intelligent species humans have ever met, are on the cusp of a species-defining civil war.

You've heard of him. He's Adam Cain, the alien with an attitude. Now he's back...in a series of new adventures as a badass human, showing the galaxy who's the boss. Accompanied by his buddies Riyad Tarazi and Sherri Valentine, Adam is struggling to make ends meet on a distant tropical world running Capt. Cain's Bar & Grill. The problem: They picked the worst place in the galaxy to run a legitimate business...smack dab in the middle of lawless Dead Zone. Comprised of a hundred dead worlds, The Zone is a gold-rush-like region of salvagers, pirates, and scoundrels.

The Cadian Gate is broken, and the Imperium is riven in two. The might of the Traitor Legions, kept shackled for millennia behind walls of iron and sorcery, has been unleashed on a darkening galaxy. Among those seeking vengeance on the Corpse Emperor’s faltering realm are the Death Guard, once proud crusaders of the Legiones Astartes, now debased creatures of terror and contagion.