OCD Book: Theory, Research & Treatment for Obsessive-Compulsive Disorder - Essential Guide for Therapists & Patients" （如果原始标题是商品标题，建议优化为更符合电商SEO的格式，包含核心关键词"OCD"和"Obsessive-Compulsive Disorder"，并明确目标受众"therapists & patients"。使用场景部分强调其作为"Essential Guide"的实用性。）

Providing a comprehensive overview of obsessive-compulsive disorder (OCD), this book brings together timely contributions from leading researchers and practitioners in the field. In sections covering psychopathology, assessment and treatment, and obsessive-compulsive spectrum disorders, chapters contain a wealth of new and recent data, numerous case examples, and helpful conceptual and clinical pointers. An appendix features extensive resource listings for both clinicians and patients.