When Gunnar McConnell inherits a treasure map after his uncle's death, he goes on the hunt of his life and can't believe what he finds. There isn't just gold on those mountains, but the secret of a lifetime—a starship that can take him to worlds unknown, and a universe full of life.

When the Ornu came, they took Earth in a single night. Humanity never stood a chance. Now, they force us to crew their ships and fight their wars for them. They hold Earth hostage, and if we refuse to do their bidding, they’ll lay waste to our precious blue marble. Slaughtering the billions who live there. But when Captain Bill Henderson is sent to claim a small moon for his masters, he finds something they never accounted for. An ancient warship – a behemoth abandoned for millennia by a species that reached its peak at the dawn of the universe.

Get ready to experience two more origin stories in the Backyard Starship universe.

The war against the AI was won but a new threat is rising. Hank Spears is content with his life as a scrapper until he unearths an artificial intelligence who warns him of a grave threat to all life in the universe. Since AI has long been outlawed and anyone caught harboring one is imprisoned or executed, the two must go on the run, fleeing into the far reaches of space. They must avoid capture, all for the sake of those who would imprison them. Looking for help from old friends to fight new enemies, Hank must find a way to save himself so that he can save the universe.

When the research starship Galileo vanishes without a trace, the powers-that-be are quick to bury the incident, eager to prevent escalating tensions that could lead to war. As a former POW, Soren refuses to give the ship up for lost. His daughter is one of the missing. Taking matters into his own hands, Soren starts pulling strings and calling in favors, determined to launch a clandestine mission to bring Galileo home. When an old friend offers him a ship for the operation, he expects a rusty relic headed for the scrapyard.

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.

During a test flight for the world’s first warp engine, Major Noah Gantz is set to go down in the history books. Despite years of training, the mission goes sideways, and instead of a quick trip to the moon and back, Noah's ship is transported across the universe to stars unknown.

In a single act of courage, the young American grunt saves an interstellar soldier from certain death at the hands of a vicious killer. Afterward, she promises to show him the stars. Mark will begin his new life far away from Earth—a life not so different from that of a humble soldier. Out among the asteroids, he learns of swords and honor, starships and empires. He learns what it means to be a Peacemaker. Along the way, he's joined by Perry, his combat AI companion who helps Mark learn how to survive—and earn a living—among the stars.

When aliens invade Las Vegas, one man is thrust into a battle beyond imagination, fighting the terrifying shock troops of a sprawling galactic empire. To protect a terrified child, he seizes the strange weapon of a fallen hero—an ancient, sentient sword—and is catapulted far into the future with no way back. Now trapped in an alien world, he must master the sword's mysterious power and navigate a deadly game of political intrigue. But time is running out for humanity.

Charlie Travers figures his life can’t get much worse. He lives over a pizza restaurant, he’s lost his girlfriend, and has no prospects for a career. Then, he’s abducted by an alien robot and taken across the galaxy. When he wakes up, he finds himself stranded thousands of light-years away, and about to be killed by space pirates.