C. S. Lewis (1898-1963) was a British novelist, poet, academic, medievalist, literary critic, essayist, lay theologian, broadcaster, lecturer, and Christian apologist. He held academic positions at both Oxford University and Cambridge University but is best known for his works of fiction-such as The Chronicles of Narnia, The Space Trilogy, and The Screwtape Letters-and for his nonfiction-such as Mere Christianity, A Grief Observed, and The Problem of Pain-which still continue to attract thousands of new readers every year.