The new edition of the textbook provides an up-to-date overview of the fundamentals of clinical child psychology as well as the treatment of mental disorders in childhood and adolescence. The revised and expanded edition of this established textbook presents an overview of the basics and important application areas of clinical child psychology in 45 chapters. Central approaches to the explanation and treatment of mental disorders in childhood and adolescence are at the forefront. The textbook first addresses the concepts of clinical child psychology, informing about classification, causes, development, and course of mental disorders in childhood and adolescence, with a particular focus on age-specific developmental risks and deviations. A significant portion is then dedicated to the presentation of developmental disorders as well as emotional and behavioral disorders.