One of the many things I love about books and the reading community is how versatile and cross-referenced it is. I have been noticing in so many of the books that I am reading that other books are referenced, or used as a focal point, or read, or written or some combination of these. There are ton's of great books out there about books...if that makes any sense and these are always fun if a bit meta. There are books that use a particular book as a jumping off point, or are referenced through out. Some books just acknowledge their own characters love of reading.