In the United States, about 1 in 40 adults and 1 in 100 kids have Obsessive-Compulsive Disorder. Author Jacqueline Adams explores this disorder, explaining causes, diagnosis, and treatment. Readers will learn how people live with this condition, and the ongoing efforts to meet the challenges of O.C.D. Helpful sidebars, diagrams, charts, and images convey complex concepts in a straightforward way.