Ariel Nathanson is a Consultant Child and Adolescent Psychotherapist. He is the clinical lead for the treatment of the under 21s at the Portman Clinic, where he has been working for many years, specialising in the assessment and treatment of children, adolescents and young adults who display perverse, delinquent and violent behaviours.

Graham Music (PHD) is Consultant Child and Adolescent Psychotherapist at the Tavistock and Portman Clinics and an adult psychotherapist in private practice. Formerly Associate Clinical Director of the Tavistock's child and family department, he has managed a range of services working with the aftermath of child maltreatment and neglect, and organised many community based psychotherapy services.

Janine Sternberg is Clinical Course Director of the IPCAPA (Independent Psychoanalytic Child and Adolescent Psychotherapy Association) training at the bpf. Previously she worked as a Consultant Child Psychotherapist at the Portman Clinic, Tavistock and Portman NHS Trust, having worked for many years before that at the Tavistock Mulberry Bush Day Unit, a small unit for children with complex difficulties.

Introduction; 1: Key concepts developed at the Portman Clinic, Marianne Parsons; 2: Motiveless malignity: Problems in the psychotherapy of patients with psychopathic features, Anne Alvarez; 3: Considering Perversion from a Portman Clinic Perspective, Donald Campbell; 4: Young people in difficulty with Internet sex and pornography, Graham Music and Heather Wood; 5: Seeing and being seen: the psychodynamics of pornography through the lens of Winnicott`s thought, John Woods; 6: Working with mental hackers and backroom thinkers, Ariel Nathanson; 7: Angels and devils: sadism and violence in children, Graham Music; 8: Oedipal aspirations and phallic fears: on fetishistic presentation in childhood and young adulthood, Ann Horne; 9: Self-harm and the harm of others in adolescents, Tim Baker ; 10: "Securing the disaster zone. Assessing the damage. Sifting through the rubble": The early stages of psychotherapy with a traumatised boy, Patricia Allan; 11: Embracing darkness: clinical work with adolescents and young adults addicted to sexual enactments; 12: The history of the Portman Clinic, Marianne Parsons