When Allen Shawn and his twin sister, Mary, were two, she began exhibiting signs of what would be diagnosed many years later as autism. At the age of eight, with almost no warning, her parents sent Mary to a residential treatment center, to never live at home again. Fifty years later, Shawn realized that his fate was inextricably linked to his sister's, and that their natures were far from being different.

Lost -- July 2005 -- Together -- Summer -- Things not seen -- Cracks between the keys -- Dislocations -- Binary stars -- Finding words -- Autism -- At Briarcliff.