This is one of the few studies of developmental criminology to appear in our country. It is a book that merges within its pages international contributions (totally unknown in Italy) with an understanding of the person of the delinquent, with prevention and the treatment of the phenomenon in its educational and psychotherapeutic dimension. The book has a psychological and psychosociological outlook. It is original in the “practical” aspects and is meant to be an important aid even to all those who, at various levels, contribute to prevention and recovery. It is therefore aimed at educators, teaching psychologists, magistrates, workers in the social services and rehabilitation communities, operators in detention centres, the Forces of Law and Order.