BBC, the original broadcasters of Jack Lewis's Mere Christianity radio talks during WWII, have added a couple of audio recordings of Lewis to their site for anyone to listen to. They include one of Lewis's war talks, Beyond Personality: The New Men, and the introduction to his The Great Divorce.
I have a cassette recording of Lewis narrating his book The Four Loves, and I always thought it was great to hear these works from the mouth of the man himself. Plus he has such a great accent!
Check them out at the article from Christianity Today above linked, or at BBC right here.