Young professionals in psychiatry and psychosomatic medicine often have to lead groups without being trained to do so. This textbook teaches the basics of group therapy based on the Göttingen model. This concept, which has been continuously developed for forty years, works with diverse forms of groups and makes reference to the special interactional character within the group. Examples and questions stimulate the reader to put what they have learned into practice on a daily basis. The use of the Göttingen model enables the different clinical pictures to be dealt with. Corresponding modifications of group therapy have been developed. The experience gathered in this book comes from the regular advanced training of the Göttingen working group on the use of psychoanalysis in groups and takes into account the current state of research and recent developments in this field.