With their book on the neuroaffective foundations of child development and the application of these insights in the field of psychotherapeutic work with children, Marianne and Susan truly venture into new territory. They describe the various levels of human interaction, their influence on brain development, and the promotion of healthy personalities and fulfilling relationships. These levels or stages of interaction are as central to psychotherapeutic work with adults as they are with children. Marianne Bentzen and Susan Hart expertly describe the dynamics of child relationships based on the latest scientific findings, with incredible precision and clarity. The neurobiological and micro-regulatory processes of the mostly unconscious communication between the child and caregiving figures are made easy to understand.