This bestselling, classic work offers a definitive presentation of the theory and practice of cognitive therapy for depression. Aaron T. Beck and his associates set forth their seminal argument that depression arises from a "cognitive triad" of errors and from the idiosyncratic way that one infers, recollects, and generalizes. From the initial interview to termination, many helpful case examples demonstrate how cognitive-behavioral interventions can loosen the grip of "depressogenic" thoughts and assumptions. Guidance is provided for working with individuals and groups to address the full range of problems that patients face, including suicidal ideation and possible relapse.