Compiled in this volume are summaries of the knowledge base on prevention of alcohol and other drug use and mental disorders in children and adolescents. The papers address risk factors, preventive interventions, conceptual and methodological issues, epidemiology, identification, service delivery and treatment, research, and professional training. After an introduction by Irving Philips, papers with the following titles and authors are presented: "Commentary: The Integration of Problem and Prevention Perspectives: Mental Disorders Associated with Alcohol and Drug Use" (Morton M. Silverman); "Conceptual Issues in Prevention" (Arnold J. Sameroff and Barbara H. Fiese); "The Prevention of Child and Adolescent Disorders: From Theory to Research" (Raymond P. Lorion and others);"Prevention Programming as Organizational Reinvention: From Research to Implementation" (Richard H. Price and Raymond P. Lorion); "Public Policy: Risk Factor or Remedy?" (Leon Eisenberg); "Psychiatric Disorder in Parents as a Risk Factor for Children" (Michael Rutter); "Risks for Maladjustment Associated with Chronic Illness in Childhood" (I. Barry Pless and Terence M. Nolan); "Prevention of Psychiatric Morbidity in Children after Disaster" (Robert S. Pynoos and Kathi Nader); "Conduct Disorder: Risk Factors and Prevention" (D. R. Offord); "Prevention of Alcohol and Drug Abuse: A Critical Review of Risk Factors and Prevention Strategies" (Karol L. Kumpfer); "Prevention Issues in Youth Suicide" (David Shaffer and others); "Prevention of Learning Disorders" (Archie A. Silver and Rosa A. Hagin); "Prevention of Psychiatric Disorders in Children and Adolescents: A Summary of Findings and Recommendations from Project Prevention" (David Shaffer). Reference lists follow each chapter. (JDD)