Letters to an American Lady by C. S. Lewis, first published in 1967 and edited by Clyde S. Kilby, is a collection of personal letters written between 1950 and 1963 to an unnamed American woman. Spanning about 121–128 pages, these correspondences reveal a candid and intimate side of Lewis, offering reflections on faith, prayer, humility, daily life, health struggles, and even his fondness for pets. Originally never intended for publication, the letters carry a warm, sincere tone that blends theological insight with everyday observations, giving readers a glimpse into Lewis’s personal character and spiritual wisdom beyond his formal works.