Fourth World: 1 (Iamos Trilogy)

His past is her future. Life on Mars isnt all its cracked up to be when youre Isaak Contreras. Ever since his dad disappeared two years ago Isaaks been struggling to keep up in school and he never seems to be able to live up to his moms high expectations. But everything changes when he finds an ancient coin among his missing fathers 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...