During adolescence, the bond with peer groups becomes a significant attachment system that provides protection and security to young people and can promote their development. On the other hand, it can also be a source of anxiety that hinders autonomy and individuality. The authors of this volume address the following psychological issues faced by adolescents particularly at risk due to disorganized childhood attachment experiences: depression, suicidality, anxiety, violence, substance abuse, sexual difficulties, eating disorders, and dissociation. Contributions from Ulrike Amann, Katja Bonnländer, Roger Kobak, Christiane Lutz, Marlene Moretti, Andrea Perry, Raija-Leena Punamäki, Sabine Walper, Sandra Wieland, Simon Wilkinson, Peter Zimmermann, and Karl Heinz Brisch. Secure early childhood attachment experiences are of particular importance during adolescence.