Now in a thoroughly revised and expanded fourth edition, this widely adopted text provides students and practitioners with state-of-the-science guidelines for treating frequently encountered adult disorders. Contributors are leading clinical researchers who present essential background knowledge on each problem, describe the conceptual and empirical bases of their respective approaches, and detail the nuts and bolts of evidence-based assessment and intervention, including vivid clinical illustrations. Authoritative, timely, and eminently practical, the fourth edition has been updated throughout with the latest treatment innovations and empirical findings. Four entirely new chapters cover behavioral activation for depression, psychological treatments for positive symptoms of schizophrenia, and unified approaches to emotional disorders and eating disorders.