The 200,000 or so people who stroll through Tucson's Arizona-Sonora Desert Museum each year bring with them many questions: What is a desert? How is it that gophers and rattlesnakes can live in the same hole? How can I stop Gila woodpeckers from whittling down my house? If I find a desert tortoise, can I make it a pet? David Lazaroff, a biologist and writer, answers these and dozens more questions in this entertaining, intelligent book, which belongs on every Southwesterner's bookshelf. --Gregory McNamee