United Federation Marine Lance Corporal Tamara Veal catches the attention of recruiters who nominate her to serve as a Single Combat Specialist. Gladiators, as they are better known, are genetically modified human champions who meet Klethos d'relle in the combat ring when the Klethos issue a challenge for a human world. Win, and the planet stays in human possession; lose, and not only do they lose their lives, but the world as well.

What would you do to change your life? How far would you go? How hard would you fight? Rather than work his bones into dust toiling away on a barren world, Ryck Lysander chooses to enlist in the Federation Marine Corps. But as he quickly finds out, this path isn't just a job...it's a calling...and not everyone is suited to wear the uniform.

Keel Hennity was one of the greatest gladiators in the universe, the victor of countless glorious battles. He was assigned to guard the most dangerous creatures on his home planet. Then he died, and his life truly began. When Keel's consciousness was downloaded into the robotic body of an Imperial Marine, he was tasked with protecting the emperor and controlling the incredibly dangerous creature that ended his first life. Can Keel unlock the secrets of Star Dragons and protect the galaxy from a dragon-human war that could end life as we know it?

Jasper van Ruiker is an elderly algae farmer, drafted into the local militia to defend his village from the invading Tenners. Lieutenant Castor "Mountie" Klocek is a Navy pilot, shot down during an air-to-ground mission. Lance Corporal Javier Julio Gregory Portillo and Sergeant Gary Go are Marine combat engineers, the only survivors of a deep-recon mission to destroy a bridge.

In a single ruthless blow, Commander Lorraine Adamant’s favorite uncle murders everyone ahead of him in the succession for the Star Kingdom of Adamant. Only luck and the paranoia of her bodyguard, Vigo Jarret, saves Lorraine’s life. On the run in a single starship Lorraine should never have commanded, with a crew she can not trust, she swiftly learns her uncle’s hounds are hot on her heels. She must gather every skill, every trick, she has ever learned if she is to survive—and pray the uncle who taught her those tricks is a step behind.

Human slavers attack. Despite trying to fight back, there is nothing the young Leefe can do to save his family and friends. But he doesn't have to. The Imperial Marines arrive in the nick of time, and they hate slavers. Three tri-years later, when the new emperor issues a proclamation to integrate the imperial military with non-human citizens, Leefe is among the first to volunteer. Integration to resurrect the empire as a force for good is challenged by centuries of prejudice against the "dung races." 

Esther and Noah Lysander are the twin children of General Ryck Lysander, Commandant of the Marine Corps, leader of the Evolution and Chairman of the Federation. When they are told that their father and mother have been assassinated, they are both devastated. Cut adrift, they each decide to enlist in the Corps - but for different reasons.

Capernica is invaded! Far from the war zone, the Wolvics have launched a surprise attack while the confederation army and navy are engaged in other fronts, and it is up to those on the planet to hold off the invaders until the confederation forces can respond. This trilogy contains three such stories of people responding to the call.

U.S. Marine Tyson Gage has only one option left: to become a bounty hunter, then collect enough loot and upgrades to mount a rescue among the stars... Eight hundred years in the future. Joined by his dog and a beautiful woman who, despite their attraction, is on his last nerve, Gage must leave life on Earth behind for a universe of aliens, criminals, and hyperspace more deadly and awesome than he can imagine.

Avalon was the flagship of the Castle Federation in the last war, now 20 years past. The first of the deep space carriers, no other warship in the fleet holds as many honors or has recorded as many kills. No other warship in the fleet is as old. Accepting the inevitable, the Federation Space Navy has decided to refit her and send her on a tour of the frontier, showing the flag to their allies and enemies as a reminder of her glory - and then decommission her for good.