Book excerpt: "The book begins with a summary of the psychopathology of OCD as well as a critical explication of the phenomenology of obsessions and compulsions.The first part of the book provides a working knowledge of the psychopathology of the disorder, as well as the theoretical and empirical basis of the cognitive and behavioral approach to OCD. The second part of the book updates the reader on current OCD theory and research, including ERP. The third part of the book offers detailed, practical, step-by-step instruction on how to conduct CBT for OCD. The final section consists of four new chapters of OCD symptom subtypes"--