This book presents the surgical therapy of obesity and metabolic diseases in a practice-oriented and detailed way. The specific surgical procedures with their indications, performance and risks are described precisely in words and pictures. Special emphasis is placed on the choice of the appropriate surgical procedure for the individual patient. In addition to the mechanisms of action, interdisciplinary preoperative evaluation of the patient and postoperative aftercare are explained. Furthermore, surgical, internal and psychosomatic complications and complication management are described. Information on obesity center organization and alternative bariatric therapies complete the volume.