The game is once again afoot in this thrilling mystery from the New York Times bestselling author of The House of Silk and The Word is Murder, sanctioned by the Conan Doyle estate, which explores what really happened when Sherlock Holmes and his arch nemesis Professor Moriarty tumbled to their doom at the Reichenbach Falls--now available in a limited Olive Edition.

"The author turns up the suspense, the sleuths turn up the clues, and crooks end up dead all while Moriarty's specter hovers. Anything but elementary, this clever thriller is sure to please Sherlock fans."--People Magazine, Book of the Week Review

Days after Holmes and Moriarty disappear into the waterfall's churning depths, Frederick Chase, a senior investigator at New York's infamous Pinkerton Detective Agency, arrives in Switzerland. Chase brings with him a dire warning: Moriarty's death has left a convenient vacancy in London's criminal underworld. There is no shortage of candidates to take his place--including one particularly fiendish criminal mastermind.

Chase is assisted by Inspector Athelney Jones, a Scotland Yard detective and devoted student of Holmes's methods of deduction, whom Conan Doyle introduced in The Sign of Four. The two men join forces and fight their way through the sinuous streets of Victorian London in pursuit of this sinister figure, a man much feared but seldom seen, who is determined to stake his claim as Moriarty's successor.