AMEN, AMEN, by Abby Sher.

A moving and story of life with obsessive-compulsive disorder, and how the disease becomes a gift in the face of the author’s loss of both of her parents. She counts, washes, pounds, cuts and starves herself compulsively from the age of ten onwards. But her fiercest obsession is prayer — a search for someone who will protect her and the world from future loss. (Scribner/Simon & Schuster, 2009)