Preface: Delinquent Girls, Relationships, and Ordinary Magic; M.K. Underwood.- Section I. Setting the Stage.- Stability and Change in Girls' Delinquency and the Gender Gap: Trends in Violence and Alcohol Offending across Multiple Sources of Evidence; J. Schwartz, D. Steffensmeier.- Crossing Over: Girls at the Intersection of Juvenile Justice, Criminal Justice, and Child Welfare; J.L. Woolard.- Girls in the Juvenile Justice System: The Causes and Correlates of Girls' Involvement; S.R. Hawkins.- Section II. Context and Relationships.- Juvenile Assault Arrestees and Their Incidents: Same and Opposite Gender Relationships; A.L. Stahl, P. Coontz.- Girlfriends, Gun-holders, and Ghetto Rats? Moving Beyond Narrow Views of Girls in Gangs; D. Peterson.- Girls' Relational Orientation and Interpersonal Dynamics of Delinquency; S. Miller, D.-M. Winn, T. Wiki, J. Taylor.- Section III. Psychological Functioning.- Dealing with Double Jeopardy: Mental Health Disorders among Girls in the Juvenile Justice System; E.G. Marston, M.A. Russell, I. Osbuth, G.K. Watson.- Trauma and Girls' Delinquency; P.K. Kerig, S.P. Becker.- Section IV. Intervention and Implications for Practice and Policy.- Multidimensional Treatment Foster Care as an Intervention for Juvenile Justice Girls in Out-of-Home Care; L.D. Leve, P. Chamberlain, D.K. Smith, G.T. Harold.- Risk for Girls' Delinquency: Early Intervention to Promote Healthy Development; A. Rubin-Vaughan, D. Pepler, M. Walsh, K. Levene, A. Yuile.- Addressing Girls Delinquency - Recommendations for Policymakers and Practitioners; J. Chiancone.