Winters and Ingwalson write with passion, compassion, and authority in this incisive and eminently practical textbook. Adolescence substance abuse is an enormous problem in its own right, and sadly and all-too-commonly, the beginning of a pattern continuing into adult life. As these expert authors make clear throughout, the adolescent development of substance abuse can only truly be understood and managed in the context of underlying, comorbid psychological disorders. I highly recommend this book to anyone wanting to better understand substance abuse, especially students."