The Screwtape Letters by C.S. Lewis

Wormwood, a demon apprentice, must secure the damnation of a young man who's just become a Christian. He seeks the advice of an experienced devil, his uncle Screwtape. Their correspondence offers invaluable---and often humorous---insights on temptation, pride, and the ultimate victory of faith over evil forces. Paperback with French flaps and deckled page edges.