I thought this book was pretty interesting and some of you might not know about it. I'm quoting the page here: "Wrap your mind around this original collection of origami paper puzzles! Transform each sheet into a square shape so that only black shows on one side and only white on the other. Starts off simple but the challenge increases with every crease of paper! Includes 100 captivating puzzles...once you start folding you won't be able to stop!"
Manifold: The Origami Mind Bender http://www.brainwright.com/products/display/8007
