C.S. Lewis (Clive Staples Lewis) was a British writer, scholar, and Christian apologist, best known for The Chronicles of Narnia series. He was born on November 29, 1898, in Belfast, Ireland, and died on November 22, 1963, in Oxford, England. Lewis studied at Oxford University and later became a fellow and tutor in English literature at Magdalen College, Oxford, where he taught for nearly 30 years. He was a close friend of author J.R.R. Tolkien, and both were members of the informal literary group The Inklings. Originally an atheist, Lewis converted to Christianity in 1931, a shift that shaped much of his later writing. He wrote extensively on faith, morality, and theology in works like Mere Christianity, The Problem of Pain, and The Screwtape Letters. Though respected as a scholar of medieval and Renaissance literature, Lewis is most widely remembered for his imaginative fiction, particularly The Chronicles of Narnia, which blends fantasy, myth, and Christian themes.