Now in a revised and expanded third edition, this widely adopted text offers a balanced review of major contemporary perspectives on substance abuse and addiction. Thoroughly updated chapters address disease models; psychoanalytic, conditioning, cognitive, and family systems formulations; and social and cultural foundations. Two new chapters on prevention models and comorbidity broaden the volume's scope. Written in a lucid, accessible style, the third edition is grounded in the latest theory and research. Applications to the helping process are emphasized and learning is facilitated with case examples, review questions, and end-of-chapter summaries.