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.

Out of the blue, a young Space Fleet officer's dream becomes reality: He's made captain of a starship. Just in time for the return of humanity's most terrible enemy, after 50 years of peace. To survive against this enemy, Captain Tad Thatcher will have to do more than learn how to become an effective commander, or how to wrangle his wayward crew. He will need to reinvent space combat. From scratch.

Captain Keyes is loved by the public but hated by Command. He captains the UHS Providence, an aging supercarrier and the last human ship not dependent on dark tech - technology humanity has used to rule over the galaxy since barely defeating the Ixa in the First Galactic War. Dominance has come at a cost. Over the decades, old allies have grown resentful, and when dark tech itself fails, Captain Keyes’ predictions start coming true: those old allies are now enemies.

Jason Burke was a man hiding from himself in a small cabin high in the American Rocky Mountains when his simple, quiet life was shattered one night by what he first assumed was an aviation mishap. But when he investigates the crash, what he finds will yank him out of his self-imposed exile and thrust him into a world he could have never imagined.

We had 20 short years of peace. Twenty years to put worlds back together. Twenty years for Captain Vin Husher to convince us the aliens would return. We didn’t listen. Warmonger, we called him. Washed up, we called him. But now, the enemy has returned, with high-tech weaponry well beyond anything of which humanity has dreamed. If Husher and his ragtag crew can’t manage to stop them, they will smash us.

They won't settle for mere victory. They want to exterminate us. Every last one of us. A surprise attack has sent the Star Alliance fleeing for its life. A remnant of a remnant, their meager fleet—all that remains alive—flees to what seems like a safe harbor: a forgotten backwater planet called Earth. Join ace fighter pilot Chase as he teams up with the modern-day militaries of Earth and fights the last battle for the universe.

Convicted of a minor traffic violation, Rev Pelletier is conscripted into the Perseus Union Marine Corps...for up to a 30-year term of service. Anxious to get back to his civilian life and job, Rev opts for a shorter term as a Marine Raider taking the fight to the enemy. But with extremely high mortality rates, can he and his friends survive until their term of service is over?

We were fighting on the wrong side of a war we couldn't win. And that was the good news. The Ruhar hit us on Columbus Day. There we were, innocently drifting along the cosmos on our little blue marble, like the native Americans in 1492. Over the horizon come ships of a technologically advanced, aggressive culture, and BAM! There go the good old days, when humans only got killed by each other. So, Columbus Day. It fits. When the morning sky twinkled again, this time with Kristang starships jumping in to hammer the Ruhar, we thought we were saved.

Terminal Lance Lucky Lee Savage likes his life. Sure, doing PT hungover is a pain, but no one can dodge responsibility like he can - or sweet-talk the cooks into giving out double rations. 

Go to war or go to jail. For small-time street hustler Cam Alvarez, the choice is simple.... He has no family, no friends, no place in the world...nothing to lose. When his latest con results in the death of a cartel hit man, Cam opts to join the Marines and leave Earth to fight a vicious alien enemy. Drafted into the Marine Drop-Troopers, Cam discovers there’s one thing he’s even better at than running street-con games, and that’s killing the enemy.

Legion Dark Ops has always been a unit shrouded in secrecy. Tasked with performing covert missions, its kill teams are filled with the best warriors from within the ranks of the Legion. Kel Turner is one of the youngest legionnaires ever to be selected to its ranks. After many battles and trials, he is faced with the greatest challenge of his life - operating by himself on a remote planet at the galaxy's edge, a foot soldier for the policies of the duplicitous House of Reason, tasked with solving a crisis that would take ten kill teams to resolve.

Jason McKay and Shannon Stark, two young Republic Space Fleet Intelligence officers, are given the leadership of a new special ops unit. The mission? Guard the spoiled daughter of an important senator. Neither thought the mission would be anything more than babysitting....Until the aliens invaded the colony. Implacable, relentless, merciless - the armored creatures will slaughter anyone. Survival will be the least of their challenges, as Jason and Shannon are forced to weigh the lives of the people they lead, and the ones they love, against their duty, honor, and planet. 

From the ashes of a devastated Boston, a harrowing legend emerges. Thirteen years prior, the colossal kaiju, Nemesis, ravaged the city in her relentless pursuit of retribution. Today, mankind's survival teeters on the sacrificial offerings atop a chilling monolith known as The Altar, where the condemned pay the ultimate price to prevent Nemesis's wrath from consuming humanity.

Aliens exist...and, as it turns out, most of them aren’t that friendly. Jacob Brown wasn’t even born yet the first time they attacked Earth. He was only 14 the second time it happened. When Earth finally came together and fielded its first spaceborne military, Jacob didn’t hesitate to volunteer. Serving aboard a mighty starship, he’d be able to defend his planet - and his family - when, inevitably, they came again.

For centuries, mankind has searched for nonhuman civilizations in the cosmos. These lost alien societies have finally been discovered—but they were destroyed long ago. Devin Starn starts off as a lowly rock rat aboard Borag, a mining ship working the dangerous end of the asteroid belt. Slowly, he gains prestige and purpose. When an alien base is uncovered, however, he must risk everything to protect his ship and her crew. What wiped out all the civilizations that came before humanity?