One World by Lyssa Chiavari

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...

Fourth World by Lyssa Chiavari

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.

Cheerleaders from Planet X by Lyssa Chiavari

Kraken Collective

Aliens are among us. And humanity’s only hope just happens to carry pom-poms. Laura Clark thought she was just your average college freshman—until the day she saw a cheerleader on a skateboard get into a superhuman brawl with a lightning-wielding stranger in a trenchcoat. And the weirdest thing of all? Nobody else saw it happen. Nobody, that is, except the beautiful but standoffish Shailene, one of the mysterious (and possibly super-powered) cheerleaders from Laura’s rival school, Bayview University. When girls start disappearing all over the City, Laura suddenly realizes that she may have seen more than she should. And if she wants to keep from disappearing herself, she needs to find some answers. But though Laura can’t shake the feeling that they’re somehow connected, Shailene is more than a little reluctant to share her secrets. With strange, bug-like creatures and a sinister man in a dark coat stalking her every step, Laura will have to uncover the truth fast if she wants to survive. The fate of the planet just might hang in the balance.