Age of Myth: Book One of The Legends of the First Empire [Sullivan, Michael J.]

A new series set in the world of the Riyria Chronicles. In the land of the Rhune, trees can tell the future and the gods are beyond reproach. But when Raithe's father is slain, he does the unthinkable--he kills a god. From this act, rises the legend of the God Killer, the seeds of a rebellion, and the question of whether the gods are really immortal after all