Newly revised and expanded, the second edition of this widely adopted text serves as a practical guide to working with substance users and their families in a variety of clinical contexts. Expert contributors present widely used assessment and treatment approaches together with detailed recommendations for intervening with specific substances and meeting the needs of different populations. Restructured and thoroughly updated to reflect current developments in research, practice, and policy, the second edition features six entirely new chapters. The section on clinical populations has been augmented with coverage of older adults and lesbian, gay, and bisexual substance abusers. Other new chapters cover applications of motivational techniques, harm reduction, and strategies for working with involuntary clients.