This authoritative text gives students and practicing psychotherapists a rich understanding of the connections between psychopathology research and clinical practice. Chapters thoroughly describe the etiology, symptoms and clinical features, course, epidemiology, and associated comorbidities of prevalent psychological disorders. Changes in diagnostic criteria in DSM-5 are addressed, where applicable. What sets this tightly edited volume apart are insightful discussions of how current empirical findings can inform assessment, case formulation, the therapeutic relationship, and intervention strategies (regardless of theoretical orientation). Each chapter is written collaboratively by leading psychopathology and psychotherapy researchers.