In April 1992 a young man from a well-to-do family hitchhiked to Alaska and walked alone into the wilderness north of Mt. McKinley. His name was Christopher Johnson McCandless. He had given $25,000 in savings to charity, abandoned his car and most of his possessions, burned all the cash in his wallet, and invented a new life for himself. Four months later, his decomposed body was found by a moose hunter....

Described by friends and relatives as smart, literate, compassionate, and funny, did McCandless simply read too much Thoreau and Jack London and lose sight of the dangers of heading into the wilderness alone? Krakauer, whose own adventures have taken him to the perilous heights of Everest, provides some answers by exploring the pull the outdoors, seductive yet often dangerous, has had on his own life.