The Wiley Handbook of Obsessive Compulsive Disorders, 2 volume set, provides a comprehensive reference on the phenomenology, epidemiology, assessment, and treatment of OCD and OCD-related conditions throughout the lifespan and across cultures. * Provides the most complete and up-to-date information on the highly diverse spectrum of OCD-related issues experienced by individuals through the lifespan and cross-culturally * Covers OCD-related conditions including Tourette's syndrome, excoriation disorder, trichotillomania, hoarding disorder, body dysmorphic disorder and many others * OCD and related conditions present formidable challenges for both research and practice, with few studies having moved beyond the most typical contexts and presentations * Includes important material on OCD and related conditions in young people and older adults, and across a range of cultures with diverse social and religious norms