You're reading: Guardian: Sherlock Holmes returns in new Anthony Horowitz book, Moriarty

 Anthony Horowitz, who was first sanctioned by the Conan Doyle estate to tell a new Sherlock Holmes story three years ago, is plotting a return to the world of the super sleuth in a novel set days after Holmes and his nemesis Moriarty apparently plunged to their deaths over the Reichenbach Falls.

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