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...Set during the events of Fourth World, Book One of the Iamos Trilogy, Different Worlds is an action-packed dystopian that tells the story of the people left behind. This special paperback edition also includes two bonus short stories set in the Iamos universe.