Judge A Book By Its Cover. Impossible anatomy, cheesecake, beefcake, phallic imagery, visual nonsense, bad James Patterson prose, and more! The site's created and run by a librarian (who reads library_mofo, by the way, which should delight robyn_ma). Some of it's not quite Work-Safe. Or Sanity-Safe.
(I've read one of the books from the March 21st entry, The White Hotel: it's actually a very good, dark book, but with whacked-out cover art that inspired Judge A Book's creator to say "It's worrisome when the least disturbing thing on a cover is a Nazi!")