the socially responsible disposal of Warholia: an artist's book
California's Otis College of Art and Design have a huge database of artist books, tunnel books, experimental fiction books, pop-up books, concrete poetry books, miniature books, playing card books, copy books, visual poetry books, moveable books, flip books, comic books, folded books and more in a website that recently went live [LINK UPDATED]. Search by 'artist', 'press/publisher' or wander through by clicking 'browse'. Click on the knife on any page to snip highish resolution images.
Extraordinarily for an institution they have this caveat: "If you an artist holding copyright on any of these works and you object to having your work represented in this database, please notify us immediately. Our intention is purely educational, but we will promptly remove any images you do not wish included."