Before Amazon cons you into getting rid of your books and exchanging them for electrons that can be deleted remotely at any time, you should buy real books while you still can. And first on that list should be A Natural History of the Sonoran Desert. In one handy guide, you can find information on just about every aspect of where we live. Do turkey vultures really poop on themselves intentionally? What is caliche, anyway? Do they actually use bug blood in red food coloring? What in the heck is a Tumamoc globeberry? This book is a treasure trove of information for newcomers and old-timers alike.