Which C.S. Lewis book is addressed to J.R.R. Tolkien in its dedication?

The Screwtape Letters is the C.S. Lewis book dedicated to J.R.R. Tolkien.

Lewis’s dedication reads “To J.R.R. Tolkien,” linking the book to one of his closest Oxford friendships. Tolkien and Lewis were members of the Inklings, a literary discussion group that met regularly in Oxford. Their conversations and mutual criticism influenced both writers, although they did not agree on every literary or theological question.

Published in book form in 1942, The Screwtape Letters consists of letters from Screwtape, a senior demon, to his inexperienced nephew Wormwood. The demonic correspondence gives Lewis a satirical way to examine temptation, distraction, pride, resentment, and spiritual self-deception from an inverted point of view.

The dedication is sometimes confused with the book’s fictional correspondence, but Tolkien is not a character in the story. He was Lewis’s real-life friend and fellow writer. Lewis later dedicated The Four Loves to another person, Charles Williams, so the dedication details are useful for distinguishing his books.