This groundbreaking core textbook offers a comprehensive overview of different approaches to the causes, assessment and treatment of psychological disorders. The book includes important diagnostic frameworks, including the new DSM-5-TR, ICD-11 and PDM, but also widens the scope of coverage beyond mainstream psychiatric models to include psychological, biological, historical, sociocultural and therapeutic approaches. Contemporary and well-balanced, this book provides an even-handed and holistic foundation, allowing students to develop a strong critical mindset while retaining a robust research-driven orientation.This new edition:<i>- </i>features an innovative structure organized by presenting problem, examining each in a broad context of traditional psychiatric and alternative approaches- is grounded in lived experience of disorder: shining a spot-light on service-users through ''Case Examples'' scenarios and ''Lived Experience'' perspective pieces- Supports student learning and critic