Lavie Tidhar's space opera sci-fi tale "In Xanadu" is a Tor.com Original.
Security through physicality.
Security through redundancy.
Security through obscurity.
How do immortal artificial intelligences defend themselves? With an air gap. With a security force that has no connection to anything that can harm them. With a young woman, trained to fight and to die who, along with her cohort, must keep them

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The starship Theodore Roosevelt is fighting on the far outskirts of a galactic war, its crew made up of retreads and raw recruits. A new first officer reports, Wilson Cole, a man with a reputation for exceeding his orders (but getting results). He's been banished to the Teddy R. for his actions, but once there he again ignores his orders. ... This is the first of five novels about the starship Theodore Roosevelt. The next four will be, in order, Pirate,...

The date is 1968 of the Galactic Era, almost three thousand years from now. The Republic, created by the human race but not yet dominated by it, is in the midst of an all-out war with the Teroni Federation. Captain Wilson Cole, a man with a reputation for exceeding orders but getting results, found himself the victim of a media feeding frenzy, a political scapegoat despite years of dedicated military service. Faced with a court martial, he was rescued...

The adrenaline-fueled, explosive conclusion to the Indranan War trilogy by K. B. Wagers.Gunrunner-turned-Empress Hail Bristol was dragged back to her home planet to take her rightful place in the palace. Her sisters and parents have been murdered, and the Indranan Empire is reeling from both treasonous plots and foreign invasion.Now, on the run from enemies on all fronts, Hail prepares to fight a full-scale war for her throne and her people, even...

Jack Campbell's New York Times bestselling The Lost Fleet sci-fi adventure series has transported legions of fans out of this world and into the heat of battle. Now, readers will discover how it all began--not only for John "Black Jack" Geary and his descendant Commander Michael Geary, but for those who fought and sacrificed so much alongside them.Spanning from before the Alliance/Syndicate war to the devastating initial conflagration that would lead...

Two decades after the devastating Elemental War, which nearly destroyed the cosmos, the new Confederation restored peace and profitable commerce among the peoples and worlds of the Spiral Arm. The ambitious, innovative Roamers went back to their traditional business of harvesting the vital stardrive fuel ekti from the clouds of gas giant planets, and the telepathic green priests of Theroc provided instantaneous galaxy-wide communication via their...

K. B. Wagers military SF novel A Pale Light in the Black introduces the Near-Earth Orbital Guard—NeoG—inspired by the U.S. Coast Guard's real-life mission.
For the past year, their close loss in the annual Boarding Games has haunted Interceptor Team: Zuma's Ghost. With this year's competition looming, they're looking forward to some payback—until an unexpected personnel change leaves them reeling. Their best swordsman...

"Former gunrunner-turned-Empress Hail Bristol was dragged back to her home planet to fill her rightful position in the palace. With her sisters and parents murdered, the Indranan empire is on the brink of war. Hail must quickly make alliances with nearby worlds if she has any hope of surviving her rule. When peace talks turn violent and Hail realizes she's been betrayed, she must rely on her old gunrunning ways to get out of trouble. With help from...

The date is 1968 of the Galactic Era, almost three thousand years from now. The Republic, dominated by the human race, is in the midst of an all-out war with the Teroni Federation. Almost a year has passed since the events of Starship: Mercenary. Captain Wilson Cole now commands a fleet of almost fifty ships, and he has become the single greatest military force on the Inner Frontier. With one exception. The Republic still comes and goes as it pleases,...

"Kenna, an aspirational teen guru, wanders destitute across the stars as he tries to achieve his parents' ambition to advise the celestial elite. Everything changes when Kenna wins a free dinner at The Sol Majestic, the galaxy's most renowned restaurant, giving him access to the cosmos's one-percent. His dream is jeopardized, however, when he learns his highly-publicized "free meal" risks putting The Sol Majestic into financial ruin. Kenna and a motley...