The book provides a comprehensive account of the current state of knowledge in child psychiatry, blending research approaches and findings with the understanding that comes from clinical experience and practice. For the new edition a major revision and updating of all chapters has been carried out. The section on adolescent disorders has been considerably extended, and the coverage of treatment approaches has been strengthened and broadened. There are no less than 18 new chapters, and many new authors from the UK and USA have contributed.