C. S. Lewis is a well-known author of the fantasy series Narnia as well as other fantasy and sci-fi books. All of his books strongly show his Christian beliefs.
C. S. Lewis's most well known works are the Chronicles of Narnia. However, his other works, such The Screwtape Letters and Out of the Silent Planet, enjoy similar fame.
C. S. Lewis was a Christian evolutionist, something that many today consider an oxymoron. However, no one could deny that he was Christian, and his book Perelandria clearly demostrates that he is an evolutionist.
He was also a member of The Inklings, a group of four writers including J. R. R. Tolkien, the only other to survive World War One.