Moriarty (2008)

John Gardner's long-delayed third book in his Professor Moriarty trilogy, originally titled The Redemption of Moriarty, was published posthumously in 2008 as just Moriarty.

Bestselling British novelist John Gardner published two books purporting to be the true history of Professor James Moriarty, archenemy of Sherlock Holmes, the Napoleon of crime. The books - The Return of Moriarty and The Revenge of Moriarty - were praised as stand-alone volumes set in a vividly accurate Victorian London and a stunning vision of the underworld of the time, inhabited by the kind of men and women who lived and preyed on the society of the late 19th century. 

Now it is the turn of the century and Moriarty has been away from London for several years, realizing his plans to set up crime syndicates in major U. S. cities. He is suddenly called back to London where his vast criminal society has been overrun by a rival concern led by the shadowy Sir Jordan 'Mad Jack' de Levant - a supposed gentleman hoodlum who is acting on behalf of the leaders of well-known criminal elements in France, Italy, Spain and Germany. 

Moriarty lives again and revolts against the upstart criminals who have attempted to oust him from his rightful place as king of all criminal endeavour.

Title: Moriarty
Author: John Gardner
Year: 2008
Publisher: Houghton Mifflin Harcourt
Purchase: Amazon.com | Amazon.co.uk

Moriarty (2014)

Anthony Horowitz followed up his successful Holmes pastiche The House of Silk with another bestseller about Professor Moriarty. The author has promised more Holmes and Moriarty adventures to come.

The game is once again afoot in this thrilling mystery from the bestselling author of The House of Silk, 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.

Internationally bestselling author Anthony Horowitz’s nail-biting new novel plunges us back into the dark and complex world of detective Sherlock Holmes and Moriarty—dubbed the Napoleon of crime” by Holmes—in the aftermath of their fateful struggle at the Reichenbach Falls.

Days after the encounter at the Swiss waterfall, Pinkerton detective agent Frederick Chase arrives in Europe from New York. Moriarty’s death has left an immediate, poisonous vacuum in the criminal underworld, and there is no shortage of candidates to take his place—including one particularly fiendish criminal mastermind.

Chase and Scotland Yard Inspector Athelney Jones, a devoted student of Holmes’s methods of investigation and deduction originally introduced by Conan Doyle in “The Sign of Four”, must forge a path through the darkest corners of England’s capital—from the elegant squares of Mayfair to the shadowy wharfs and alleyways of the London Docks—in pursuit of this sinister figure, a man much feared but seldom seen, who is determined to stake his claim as Moriarty’s successor.

A riveting, deeply atmospheric tale of murder and menace from one of the only writers to earn the seal of approval from Conan Doyle’s estate, Moriarty breathes life into Holmes’s dark and fascinating world.

Title: Moriarty
Author: Anthony Horowitz
Year: 2014
Publisher: Harper
Purchase: Amazon