I took a class once that was all about "books arts." Before you assume I was getting my BA in Witchery, let me explain. There's a whole wave of art centered around books.
I've said more than once that I love art that incorporates words or text, and books are obviously included in this.
Dani posted a cool piece of book art awhile ago that inspired me to find more.
Melbourne artist Nicholas Jones:
(first three photos from The Design Files, last from Jones' website)
Brian Dettmer's "Book Autopsies":
images via Centripetal Notion
and other random ones I found online:
images via Fun Forever
I want to fill my house with book art. Gahh I love it all.