The Penguin English Library Edition The deadly hand of Professor Moriarty once more reaches out to commit a vile & ingenious crime but a mole in Moriarty's criminal organization alerts Sherlock Holmes of the evil deed by means of a cipher When Holmes & Watson arrive at a Sussex manor house they appear to be too late The discovery of a body suggests that Moriarty's henchmen have been at their work But there is much more to this tale of murder than at first meets the eye