In 1986, a shy and intelligent 20-year-old named Christopher Knight left his home in Massachusetts, drove to Maine, and disappeared into the forest. He would not have a conversation with another human being until nearly three decades later, when he was arrested for stealing food. Living in a tent even through brutal winters, he had survived by his wits and courage, developing ingenious ways to store edibles and water, and to avoid freezing to death. Based on extensive interviews with Knight himself, this is a vividly detailed account of his secluded life, as well as the challenges he has faced since returning to the world.