List of books from Abe Books, weird books. Many more at the link.
I selected less than 1/3, dragged them to photoshop, and then used only half of those. I hated leaving weird books behind.
One of Abe Books' weird books is The Pop-Up Book of Phobias. What's weird about that? I own that one. It's a popular book even among non-collectors. Gawl.
Pop-ups by Matthew Reinhart, uncharacteristically uncomplicated. You should buy one.