Nixon, Heath, Introduction to Non-suicidal Self-Injury. Part I: Background Information.Heath, Schaub, Holly, Nixon, Self-Injury Today: Review of Population and Clinical Studies. Lloyd-Richardson, Nock, Prinstein, Functions of Adolescent NSSI. Part II: Etiology of Self-Injury.Klonsky, Glenn, Psychosocial Risk and Protective Factors. Lofthouse, Muehlenkamp, Adler, Non-suicidal Self-Injury and Co-occurrence. Osuch, Payne, Neurobiological Perspectives on Self-Injury. Part III: Effective Practice for Self-Injury in Youth.Cloutier, Humphreys, Measurement of NSSI in Adolescents. Heath, Nixon, Assessment of NSSI in Youth. Whitlock, Knox, Intervention and Prevention in the Community. Lieberman, Toste, Heath, Prevention and Intervention for NSSI in the Schools. Nixon, Aulakh, Townsend, Atherton, Psychosocial Interventions for Adolescents. Vale, Nixon, Kucharski, Working with Families and Adolescents with NSSI. Lofthouse, Katz, Adolescent NSSI in an Inpatient Setting. Plener, Libal, Nixon, Use of Medication in the Treatment of NSSI in Youth. Toste, Holly, Schaub, Resource Guide for Working with Youth. Heath, Nixon, Concluding Comments from Editors.