J.R.R.Tolkien's "The Lord of the Rings", it has long been recognized, was shaped and undergirded by his Christian beliefs. But he was not the only writer of fantasy to have a close relationship between his faith and his fiction. This book is a study of such relationships in four writers: Tolkien himself, his friends C.S. Lewis and Charles Williams, and, from an earlier generation, George MacDonald. It seeks to look at their use of other worlds and other beings; at their attitudes towards 'escapism'; at the presence of symbolism and myth in their writings; at the themes and ideas they had in common; and at the extent to which their fiction has a value for Christian apologetics.