The audio drama CDs in this set are OUTSTANDING! Excellent and a pleasure to listen to. The audio book, "Mere Christianity," is good stuff, but it is hard to listen to. Not CBD's fault: C.S. Lewis is very intelligent, very logical, very cerebral. It takes some serious concentration to listen to the reading of his book/his radio lectures. I just had difficulty paying attention. I agree with all he says, but it just wasn't that riveting for me. But, if your alternatives are: 1. read the book and 2. listen to the audio book, I'd say: listen to the audio book.