A Reading of an excerpt from the book 'Mere Christianity', Please note that this is NOT the voice of C.S. Lewis. Clive Staples Lewis 29 November 1898 22 November 1963 , commonly referred to as C. S. Lewis and known to his friends and family as "Jack", was an Irish-born British 1 novelist, academic, medievalist, literary critic, essayist, lay theologian and Christian apologist. He is well known for his fictional work, especially The Screwtape Letters, The Chronicles of Narnia and The Space Trilogy.