"Artists' books" are books that have been transfigured or conceived of as works of art. For some incredible examples, take a look here.
If you're looking for a study break, wander over to Thompson Library next Tuesday, September 25, from 11:30 a.m.-2:30 p.m. in Room 150A to see (and handle!) dozens of examples.
For a little legal quiz, do these modifications of books violate copyright law?