The final Sherlock Holmes novel links a gruesome murder in England to strange and violent events in the United States

The deadly hand of Professor Moriarty once more reaches out to commit a vile and ingenious crime, but a mole in Moriarty’s criminal organization alerts Sherlock Holmes of the evil deed by means of a cipher …When Holmes and 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.