Hiero's Journey (S.F. Masterworks)

The world ended. People survived. Per Hiero Desteen was a priest, a telepath-and a highly trained killer. Five thousand years after the apocalyptic event known only as The Death, Hiero is tasked with finding the secrets of the old world, which could protect his civilisation from massing enemies. The planet is not the same as it used to be. Mutations have changed the way humans and animals live together, the holocaust known as The Death. The Brotherhood of the Unclean wants to wipe out all traces of surviving human society, allowing anarchy to rule the wasteland that once was North America. Hiero's journey takes him into the heart of the Brotherhood's territory. The danger is great if he is caught . . . but even the smallest chance that humanity could be saved is worth the risk.