So, I didn’t realize this when I picked up the book, but all of What Christians Believe is already encompassed in C.S. Lewis’s larger book, Mere Christianity. And, to be honest, if you’re interested in the subject or the author, you should just pick up Mere Christianity.
What Christians Believe is the smaller, easier-to-read, condensed highlights reel. Is it still good? Yes. But all of my favorite parts, including a wonderful analogy of Christ “belonging” to humanity the same way a colony tree belongs to its sister trees, are left out.
(Short) story short: if you’re looking for an abstract of Mere Christianity, pick up What Christians Believe. But if you actually want the meat of the matter, read Mere Christianity. ♦