Clive Staples Lewis (C S Lewis, 1898 – 1963) was a British writer and lay theologian. He held academic positions in English literature at both Oxford University and Cambridge University. He is best known for his works of fiction. Especially The Screwtape Letters, The Chronicles of Narnia, and The Space Trilogy. As well as for his non fiction Christian apologetics. Such as Mere Christianity, Miracles, and The Problem of Pain. But he is also a great poet.