I seem to be the only person left who both enjoyed Narnia as a child and managed to re-read them with pleasure as an adult. I went through most of them last year and enjoyed them, although they weren't as powerful for me as when I first read them in fourth grade (I think I was about nine).

Ronald Hutton, who has written several books about the history of witchcraft and paganism, has a neat essay in his latest book about the pagan content of the famously Christian writers Lewis and Tolkien. The book is Witches, Druids, and King Arthur.