In his most extraordinary book, Oliver Sacks recounts the stories of patients lost in the bizarre, apparently inescapable world of neurological disorders. These are case studies of people who have lost their memories and with them the greater part of their pasts; who are no longer able to recognize people or common objects; whose limbs have become alien; who are afflicted and yet are gifted with uncanny artistic or mathematical talents. In Dr Sacks"s splendid and sympathetic telling, each tale is a unique and deeply human study of life struggling against incredible adversity.