What was the full name of British author C.S. Lewis?

Clive Staples Lewis (November 29, 1898 – November 22, 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 (Magdalen College, 1925–1954) and Cambridge University (Magdalene College, 1954–1963). He is best known for his works of fiction, especially The Screwtape Letters, The Chronicles of Narnia, and The Space Trilogy, and for his non-fiction Christian apologetics, such as Mere Christianity, Miracles, and The Problem of Pain.

Lewis's works have been translated into more than 30 languages and have sold millions of copies. The books that make up "The Chronicles of Narnia" have sold the most and have been popularized on stage, TV, radio, and cinema. His works entered the public domain in 2014 in countries where copyright expires 50 years after the death of the creator, such as Canada.