The third and final section, on treatment, is strengthened by the inclusion of references to the theoretical and operational systems that underlie clinical intervention. For example, there is an informative discussion about access to care, ethnicity, and insurance coverage as well as aspects of the legal context of addiction and abuse. The book urges appropriate caution as different therapies and theoretical issues are discussed. In the chapter on behavioral couples therapy, the authors recommend that "evidence, rather than ideology, should guide intervention." Prevention of adolescent risk behaviors is well discussed. Alcohol abuse is the main focus in these chapters, probably because there are fewer data about other individual substances, but it would have been desirable if some guidance had been offered. There is little discussion of management of substance withdrawal and the problems of maintaining abstinence.