Gather Darkness! By Fritz Leiber

Publisher: Del Rey, No. 28073. Mass Market in good+ condition, well bound with an unmarked interior. Scuffing and edgewear with creasing on the front spine hinge. Second printing. "In a postapocalyptic future, the Hierarchy of the Great God controls technology and, with it, the commoners. Brother Armon Jarles, a young priest, becomes enraged and speaks out against the church. When he is claimed by the forces of evil, the Hierarchy finds itself in a fight with witches--and with technology that could match its own. "