Iamos Trilogy Series by Lyssa Chiavari

Life on Mars isn't all it's cracked up to be when you're Isaak Contreras. Ever since his dad disappeared two years ago, Isaak's been struggling to keep up in school, and he never seems to be able to live up to his mom's high expectations. But everything changes when he finds an ancient coin among his missing father's possessions... moreLife on Mars isn't all it's cracked up to be when you're Isaak Contreras. Ever since his dad disappeared two years ago, Isaak's been struggling to keep up in school, and he never seems to be able to live up to his mom's high expectations. But everything changes when he finds an ancient coin among his missing father's possessions. The coin makes him a target of both the Martian colonial government and a crazed scientist with a vendetta--and it leads him to a girl from another time named Nadin, who believes that Isaak might just hold the key to saving both their worlds. That is, if they can survive long enough to use it... less

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...

IAMOS, S.C.D. 8378One 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... moreIAMOS, S.C.D. 8378One 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... less