This completely revised new edition presents all disorders in adulthood in a practical and clear manner. The structured layout of the individual chapters facilitates quick navigation through the text. The focus is on the general presentation of the disorder, models of etiology and course, diagnostics, therapeutic approaches, case studies, empirical evidence, and further literature. The textbook is primarily aimed at students, trainees, practitioners, and researchers in the fields of clinical psychology, psychiatry, and psychotherapy, as well as their neighboring disciplines. The editors and authors place particular emphasis on concrete therapeutic approaches and the grounding of therapeutic methods in clinical foundational research. To do justice to the fascinating field of behavioral therapy and its foundations, the new edition goes further.