Updated for today's health care climate, this revised and expanded second edition of the best-selling volume offers a thorough introduction to clinical work with this difficult-to-treat population. Providing a unique synthesis of chemical dependency and mental health models, the book articulates a framework for assessment and treatment and describes a range of effective counseling and motivational strategies for adolescents and adults. The second edition includes discussions of the latest developments in treatment, sample treatment plans, increased coverage of ways to incorporate 12-step concepts into mental health interventions, and a new section on trauma-based disorders in addicted female adolescents.