Buzz Bissinger's twins were born three minutes--and a world--apart. Gerry is a graduate student at Penn, preparing to become a teacher. His brother Zach has spent his life attending special schools. He'll never drive a car, or kiss a girl, or live by himself. He is a savant, challenged by serious intellectual deficits but also blessed with rare talents: an astonishing memory, a dazzling knack for navigation, and a reflexive honesty that can make him both socially awkward and surprisingly wise. Buzz realized that while he had always been an attentive father, he didn't really understand what it was like to be Zach. So one summer night Buzz and Zach hit the road to revisit all the places they have lived together during Zach's twenty-four years. Zach revels in his memories, and Buzz hopes this journey into their shared past will bring them closer and reveal to him the mysterious workings of his son's mind and heart.--From publisher description.