Son of the famous Thomas Mann, homosexual, drug-addicted, and forced to flee from his fatherland, the gifted writer Klaus Mann's comparatively short life was as artistically productive as it was devastatingly dislocated. Best-known today as the author of Mephisto, the literary enfant terrible of the Weimar era produced seven novels, a dozen plays, four biographies, and three autobiographies--among them the first works in Germany to tackle...