Book excerpt: Arizona is known for its exceptional variety of topography and ecosystems. From stands of saguaro cacti and plunging canyons to high alpine forests, many are fragile areas in need of protection. All told, Arizona has some 92 wilderness areas, and author Tom Dollar provides informative descriptions for backcountry travelers wishing to explore those 65 areas accessible to the public. (Many areas are so remote they are virtually inaccessible.) This guidebook includes suggestions for hikers, along with insights into the unique natural history of such areas as Paria Canyon, Mazatzal, Organ Pipe, and Kachina Peaks wildernesses. Outdoor photographer Jerry Sieve's dramatic photographs illustrate each of the areas described.