C.S.lewis has many books that are arguments on the Christian religion. His most known works would be The Chronicles of Narnia. I have loved these ever since I was a little kid. My mum read them to me and i am re-reading them. I am on the Silver Chair. Some people get their knowledge of the Chronicles from the movies which are not very accurate, especially the new Prince Caspian. Not many know this is actually his fourth Narnia book, not his second. You don't know Narnia unless you've read the books. the reason i don't give him full marks is because I have not read every single one of his books, though i know of them, such as the Screwtape Letters. I believe he was one of the members of a literature club called the Inklings which also included J.R.R.Tolkien(author of Lord of the Rings and many other medieval stories). I don't want to give him full marks if I have not read plenty of his works. Narnia is his only children literature but is a wonderful series to open the imaginations of young minds, as it did mine.