This book introduced the notion of AED as a family systemic condition linked to a failure to emerge into adulthood. It also introduced our treatment approach for helping the parents of adult-children. To our knowledge, this is the first work proposing a systematic treatment for a condition that is probably spreading worldwide. As a pioneering work, it must leave behind it a long trail of unanswered questions for further exploration. We sincerely hope that the following points will inspire clinicians and researchers to investigate this as yet uncharted field.