There is no more popular hero in the literary and cinematic world than Sherlock Holmes. This name became a sensation in the 1890s thanks to publications in the Strand magazine, whose circulation immediately increased by a third. According to the number of film adaptations, the story of the Baker Street detective got into the Guinness Book of Records. There is nothing to say about the number of literary pastiches, but only Anthony Horowitz received the official approval of the Conan Doyle Heritage Foundation for his novel The House of Silk.In the career of the great detective there was a case connected with such monstrous and scandalous events that Watson, the invariable narrator of fascinating stories about his brilliant friend, decided not to write about him soon. He carefully packed these notes, sent them to a safe place for safekeeping and bequeathed to open the package no earlier than a hundred years later, because the secret hidden in it called the "House of Silk" threatened to undermine all the foundations of society...Three years after the release of The House of Silk, Anthony Horowitz returned to the world of the great detective.After Professor Moriarty disappeared into the stormy waters of the Reichenbach Falls, a "vacancy" was formed in the criminal world. Among the numerous applicants for this place, a truly sinister figure appears. A detective agent from New York and a Scotland Yard inspector - a devoted admirer of Sherlock Holmes - will have to pave the way through the darkest corners of the capital of England, from the elegant squares of Mayfair to the wharves and back streets of London docks, in pursuit of someone who resolutely claims his rights as Moriarty's successor...Holmes' list of investigations continues the story "Three Monarchies", in which the narrative is again conducted on behalf of Dr. Watson.So the game begins...