Have you read The Lord of the Rings more than once? Have you at least tried to read The Silmarillion? If so, you might enjoy J.R.R. Tolkien: Author of the Century, by Tom Shippey. I thought that the book would be mostly biographical, but it is primarily a discussion of Tolkien's works -- what he wrote, what influenced his writing, where he got his ideas, why he wrote what he did, what themes emerge from his works, how he compares to other authors, what attracts readers to his works, how to respond to his critics, and, ultimately, why he deserves the title "author of the century." The book was a nice reminder of how much I've enjoyed Tolkien, and helped me to better understand why I enjoy his books. In fact, I may be inspired to start reading my Tolkien collection yet again...