Joshua's Tree — N.W. Harris

When a skateboarding accident hurls 17-year-old Joshua Tyler into a dismal future overrun by flesh-eating mutants, he taps into the strength and courage hidden within him and manages to stay alive, only to discover his horrifying relationship to the scientific genius who brought all life on Earth to the brink of annihilation.

Aided by Nadia, a beautiful warrior student who believes he may be the prophesized savior sent to rescue her people, Josh learns to fight for survival. Terrified by the constant threat of a violent death, Josh wants nothing more than to get back to his own life. But the longer he survives in this strange place, the more he learns about its creation. Charged with the job of assassinating the enemy's leader, Josh begins to uncover his connection to the army of cannibalistic monsters -- a nightmarish truth that could prevent him from ever finding his way home.