From the twisting alleyways of Constantinople to the teeming streets of London's East End...A spectre is haunting Europe. A man who is both fiend and genius. His name is Trepoff. His creed is anarchy.Abduction, assassination, atrocity mark his path across Europe.The Russians hire Moriarty to track him down. Sherlock Holmes in turn is in pursuit of Moriarty.But fate has one more card to play. The great detective and the Napoleon of crime are thrust into unholy alliance as Trepoff moves into his final and most devastating gambit....THE INFERNAL DEVICE