Now significantly revised with 80% new content, this authoritative guide synthesizes the latest knowledge on obsessive–compulsive disorder (OCD) and its treatment. Prominent clinician-researcher David A. Clark describes the "whats," "whys," and "how-tos" of CBT for a broad range of obsessions and compulsions. Combining scientific rigor and clinical acumen, the book illustrates an effective approach to assessment, case formulation, psychoeducation, and cognitive and behavioral intervention. It includes 26 reproducible forms and handouts; purchasers get access to a Web page where they can download and print the reproducible materials in a convenient 8 1/2" x 11" size. First edition title: Cognitive-Behavioral Therapy for OCD. New to This Edition *Reflects more than 15 years of major advances in clinical practice, theory, and research. *Chapters on specific OCD subtypes: contamination, doubt and repeated checking, repugnant obsessions, and symmetry/order. *Heightened clinical utility--includes more case vignettes and step-by-step procedures. *Describes important refinements to exposure and response prevention, based on inhibitory learning. *Reproducible materials now available online.