This is a brief, well-written history of Tucson, from the first Indian communities to the modern-day (early 1980s). That human history is closely tied to Mexico, both pre- and post-Spanish conquest, the ever-present threats from the Apaches to the east, and to a highly challenging natural environment. Tucson was at the northern end of Mexico until the Gadsden Purchase ($10 million for multi-thousands of square miles of northwest Mexico) in 1853. At the eastern end of the Sonoran Desert, with variously forested environments in the surrounding mountains, and desert grasslands and the Chihuahuan Desert to the Southeast, the Tucson area is considered a “biological crossroads.” The book contains maps, pictures and a good bibliography.