The book includes cases of historic interest where killers certainly went to the grave in the knowledge they had got away with murder. Cases include suspicious deaths which left detectives in South Yorkshire baffled, but which were, it would seem, acts of callous murder which were not recognised as such due to dubious police opinions and practices. There are also cases of clear murder such as a man shot in the head during the Victorian period, whose killer was never identified. The book also features more recent cold cases where there is still the possibility that the wicked men or women who were responsible for such acts of inhumanity may remain within our society.