C(live) S(taples) Lewis (1898-1963) − British author, literary scholar, and Christian apologist. He wrote more than 40 books, the best-known being, The Screwtape Letters (1942). This satire is a masterpiece of diabolical wit and moral wisdom involving a correspondence between two devils, Screwtape, one of the upper echelon in Satan's "Lowerachy," and his nephew, "Dear Wormwood," a junior devil with an earthly mission, wherein the human "patient" is under close scrutiny. The Allegory of Love (1936), his major critical work, is a study of love in medieval literature. Mere Christianity, an expanded series of 1943 BBC radio chats, is most admired and influential across a wide spectrum of Christians, which may attest to the author's success in accomplishing the aim of restating theology in a way that avoids many controversies. He also wrote a well-known science-fiction trilogy and the Chronicles of Narnia fantasies for children.