Thanks to the Librarian in Black for pointing out the very useful post on Instructables about building bookshelves out of old encyclopedias. What a fun website - look at some of the other book related things I found
How to make a secret book for stashing your gin or gun or valuables
The all important invisible book shelf so that you can mystify your friends
How about making that crummy old book into an I-Pod case?
Or your own version of digitizing books using "Steal this book" as an example
Then you can take a digitized book and turn it into a wall hanging
Or perhaps you need some book covers and have a stash of old brochures hanging around
Need a clock? Have a favorite book? Marry the two
How about dissecting that really bad novel that you just read?
sheesh - so many books, so little time