"The ten chapters which constitute this book were originally the lesson pamphlets distributed to prison officers throughout the entire federal system of penal and correctional institutions, as one part of the United States prison service study course ... In publishing these pamphlets in book form, it was not intended that it should serve as a text book for prison officers or to substitute for the method of using the individual lesson pamphlets. This book has been published for the purpose of presenting in a comprehensive unit the organization and the methods that the Bureau of Prisons has so far developed for the training of its personnel and for the improvement of the prison service in keeping with modern philosophy and practice in penology."--Prefatory note.