Lawyer-turned-writer Anne Meadows and her husband, Dan Buck, set out to solve the mystery of what really happened to Butch Cassidy and the Sundance Kid. With the tenacity of Pinkerton agents, the couple tracks the outlaws and the enigmatic Etta Place through South America, where they fled in 1901. Meadows and Buck rove Argentinian pampas, Chilean deserts, and Bolivian sierras; pore over faded newspapers and musty documents; exhume skeletons with the aid of forensic anthropologist Clyde Snow; unearth eyewitness accounts of Butch and Sundance's final holdup and the Bolivian shootout; and...