This handbook shows how professionals working in social work, health, education, and psychology can work together to provide an integrated service to children and adolescents. Outlining the challenges of working in a multi-disciplinary context, it provides key theoretical concepts and describes how to conduct joint assessments and design, deliver and evaluate interventions. Taking a life-span appraoch to working with children of all ages, from infants to adolescents, the key emphasis of the book is on the prevention of children's emotional and behavioural difficulties through effective inter-disciplinary working.