This widely adopted text introduces students and practitioners to major contemporary models of addiction. Assuming no prior knowledge in the field, the book shows how theory and research can offer a roadmap for effective intervention. It presents multiple perspectives on the causes and mechanisms of substance use problems, reviews their strengths and limitations, and examines their implications for helping people change their behavior. Evidence-based treatment and prevention strategies are described. Pedagogical features include: * accessible style and clear organization * concise end-of-chapter summaries * review questions in every chapter. New to this edition: * the latest research on prevention and treatment, including current data and revised discussions of genetic influences, family treatment models, and many other topics * updated for DSM-5 * a chapter on behavioral addictions * a chapter on promoting motivation and autonomy * a chapter on evidence-based practice.