Hundreds of thousands of clinicians and graduate students have relied on this text—now significantly revised with more than 50% new material—to learn the fundamentals of cognitive behavior therapy (CBT). Leading expert Judith S. Beck demonstrates how to engage patients, develop a sound case conceptualization, plan individualized treatment, structure sessions, and implement core cognitive, behavioral, and experiential techniques. Throughout the book, extended cases of one client with severe depression and another with depression, anxiety, and borderline personality disorder traits illustrate how a skilled therapist delivers CBT and troubleshoots common difficulties. Adding to the third edition's utility, the companion website features downloadable worksheets and videos of therapy sessions.