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,...