Autobiography of a Face by the late Lucy Grealy. It's horrific and beautiful at the same time and you owe yourself this read. This kind of thing gets said often - but this time it really applies. Lucy can paint pictures with her words in an unsympathetic and compelling voice. This book will make you want to close your eyes and look away at the circumstances of Lucy's life. But you won't.
Also please take a look at two books that my fellow Nervous Breakdown contributers have written:
Banned for Life by D.R. Haney and Totally Killer by Greg Olear. You won't be disappointed - you also probably won't get to sleep if you choose to start either of these books at night.