IAMOS, S.C.D. 8378 Nadin's planet is dying. As its atmosphere drains away, her people are forced to live huddled in domed cities for protection. With only enough resources to support the population for one more year, time is running out. Nadin thinks she's found a way to save Iamos, but it will mean defying the planet's rulers, the geroi—and betraying the geroi could cost her everything. When a strange boy from another world appears out of nowhere outside the citidome's glass walls, Nadin knows for sure that her plan will work. But to build the device that can save her people, Nadin must first find the legendary city of Elytherios. And to do that, she'll need the help of the mysterious alien boy named Isaak. MARS, 2073 C.E. All Isaak wanted was to get through his senior year at the Academy in one piece. Everything would have been fine if he hadn't found that ancient coin among his missing father's possessions. The coin seems to have a strange connection not only to Isaak's family, but to Mars' ancient past. But how is that possible, on a planet that was supposed to be dead until just forty years ago? Now Isaak's got agents of the Earth's government on his tail and a deranged factory worker stalking his every move. Everyone is desperate to get their hands on something called the Key. And the only way to escape is to unlock an even bigger secret, one that could change his life—and the fate of Mars—forever.

Surviving high school is hard enough—but when your best friend vanishes without a trace, and the only clues seem to implicate the Martian government? It can turn into a nightmare. Everything changed when Isaak disappeared. Henry, Tamara and Scylla know GSAF had something to do with it—they just need to prove it. The only problem is, crossing GSAF can get a person killed. Especially if Joseph Condor has anything to say about it...

MARS, 2075 C.E. Isaak has returned from Iamos, but life hasn't exactly gone back to normal. In what felt like a month to him, two years passed in the world he left behind—and now that he's home, he's not sure if he knows what home is anymore. Mars has become a world of riots and police states, with GSAF doing everything in their power to clamp down on the burgeoning rebellion started by Isaak's once-best friend, Henry Sandhu. It doesn't take long before he realizes that maybe coming back to Mars wasn't such a good idea. But unless they can find a way to get to the time postern—currently guarded by heavily-armed GSAF agents—Isaak is stuck in the future... and so is Nadin. Nadin thought that the future would hold her answers, but everything changed the moment they passed through the door. All she wants now is to return to Iamos and make sure that her partner, Ceilos, is safe. But once her identity as a native Martian gets out, she finds herself caught in a political struggle she doesn't understand, with both factions trying to win her over to their side. And when GSAF learns that Nadin holds the key to deciphering the mysterious System, they'll stop at nothing to keep her on Mars—permanently.

IAMOS, S.C.D. 8378 One choice was all it took to put two worlds in jeopardy—but that choice could be the thing that saves them both. By choosing to betray the geroi, Nadin saved the lives of her friends in the future, but it may have cost her own. Imprisoned and sentenced to a fate worse than death, her only hope of rescue may lie in trusting the one person her heart tells her to distrust most: Ceilos, her one-time partner and a traitor in his own right. But accepting Ceilos’ help may be the only hope Nadin has of reuniting with Isaak... and saving both Iamos and Mars. Time is running out. Something is coming, something powerful enough to change the face of the entire solar system. If Nadin and Isaak can’t figure out how to stop it, all of Iamos will be destroyed. Little do they know that’s been the Liberator’s plan all along...

What makes something worth living for? What makes something worth dying for? Marin thought she knew the answer. As an Enforcer, she knows that she—and everyone on Iamos—lives for the geroi. But all that changes when she meets a young farmer's apprentice named Eos, who tells her about a legendary city called Elytherios. Will Marin choose a life of comfort in the upper castes of the geroi's citidomes? Or will she follow Eos' dangerous path to freedom, no matter the cost? Originally published in Ama-gi Magazine in 2014, this award-winning short story laid the groundwork for what was to become The Iamos Trilogy and features characters Isaak and Nadin encounter on their journey. Set thirty Martian years (about fifty-six Earth years) before the events of the main series, "The Choice" shows us what life was like on Iamos in the early years after the Progression, and gives us a glimpse of the burgeoning rebellion that would come to a head in Nadin's lifetime.

17-year-old Delia Randall spends her days studying aboard a massive scientific submarine and building robots in secret. But her secret comes out when disaster strikes the GalaX Undersea Habitat, and the only one who can prevent tragedy is Delia—and her hand-built ROV, Amphitrite. This short story in the Iamos universe, set thirty years before the events of Fourth World, tells the story of how Tamara’s moms first met!