PAM REED has twice won the Badwater Ultramarathon, the world's toughest running event. She is the American women's record-holder in the 24-hour run (138.94 miles) and 48-hour run (220 miles). Reed has been featured on 60 Minutes, CNN, and The Late Show with David Letterman, as well as in the New York Times, Sports Illustrated, and Runner's World. She lives in Tucson, Arizona, and Jackson, Wyoming.
MITCH SISSKIND has worked as a writer on more than 20 books from major publishers. He lives in Los Angeles, California.