An exuberant, engaging account of archaeological adventures in the desert Southwest. Roberts, a contributing editor at Men's Journal with a fondness for the outdoors, travels throughout the four corners region, talking with the locals and visiting ancient sites. He investigates the factors that may have led to the demise of the Anasazi civilization -- and looks into longstanding controversies such as the reputation of Richard Wetherill, and whether the Anasazi committed acts of cannibalism in warfare.  (USW157, $14.00)