Foreword.- PART I. INTRODUCTION.- Chapter 1. Introduction: An idea whose time has come.- Chapter 2. A History of Research on Borderline Personality Disorder in Childhood and Adolescence.- PART II. ISSUES IN CONCEPTUALIZATION AND ASSESSMENT.- Chapter 3. Borderline Personality Disorder in Adolescence: Phenomenology and Construct Validity.- Chapter 4. The Underlying Factor Structure of DSM criteria in Youth BPD.- Chapter 5. Conceptualizing Youth Borderline Personality Disorder Within A PAI Framework.- Chapter 6. Conceptualizing Youth BPD within an MMPI-A Framework.- Chapter 7. Conceptualizing youth BPD within a DIPSI framework.- Chapter 8. Conceptualizing youth borderline personality disorder within a normative child personality framework.- PART III. ETIOLOGY AND CORE COMPONENTS.- Chapter 9. The Neurobiology of Adolescent-Onset Borderline Personality Disorder.- Chapter 10. Behavior genetic approaches to BPD.- Chapter 11. A Biosocial Model of BPD: Theory and Empirical Evidence.- Chapter 12. The Development of Emotional Cascades in Borderline Personality Disorder.- Chapter 13. Emotion Dysregulation among Adolescents with Borderline Personality Disorder.- Chapter 14. Self-injurious Behaviors in Adolescents with Borderline Personality Disorder.- Chapter 15. The social-cognitive basis of BPD: A theory of hypermentalizing.- PART IV. DEVELOPMENTAL COURSE AND PSYCHOSOCIAL CORRELATES.- Chapter 16. The Longitudinal Course of Borderline Personality Disorder in Youth.- Chapter 17. The Externalizing Pathway to Borderline Personality Disorder in Youth.- Chapter 18. Childhood Adversity and the Development of Borderline Personality Disorder.- Chapter 19. Parenting and the Development of Borderline Personality Disorder.- Chapter 20. A Contemporary Interpersonal Model of Borderline Personality Development.- PART V. TREATMENT.- Chapter 21. Mentalization-based treatment for adolescents with borderline traits.- Chapter 22. Transference-focused Psychotherapy for Personality Disorders in Adolescence.- Chapter 23. HYPE: A Cognitive Analytic Therapy based prevention and early intervention program for borderline personality disorder.- Chapter 24. Dialectical Behavior Therapy.- Chapter 25. Working with the Parents of Children and Adolescents with BPD.- Chapter 26. Systems Training for Emotional Predictability and Problem Solving (STEPPS).- CONCLUSIONS AND FUTURE DIRECTIONS.- Chapter 27. Borderline Personality Disorder and DSM 5.0: New Directions and Hopes for the Future.- Chapter 28. The likely classification of borderline personality disorder in adolescents in ICD-11.- Chapter 29. Some Overview.