This book is designed to provide primary care clinicians with a practical guide to the significant problems that increasingly affect the emotional health of children and adolescents. This book is written in clear, concise language by experts in developmental-behavioral pediatrics, neurodevelopmental pediatrics, adolescent medicine, psychology, and child/adolescent psychiatry. We present a comprehensive coverage of normal and pathological behaviors based on principles of child and adolescent development. The editors are nationally and internationally known experts and educators in the normal and abnormal behavior of children and youth. With the information available in this book, clinicians who care for children and adolescents will be better equipped to meet the complex needs of this fascinating and ever-changing population.