A heartbreaking yet deeply hopeful memoir about life as a twin in the face of autism. When Allen Shawn and his twin sister, Mary, were two, Mary began exhibiting signs of what would be diagnosed many years later as autism. Understanding Mary and making her life a happy one appeared to be impossible for the Shawns. At the age of eight, with almost no warning, her parents sent Mary to a residential treatment center. She never lived at home again. Fifty...