The new novel from the writer of Art in the Blood. December 1889. Clean from debunking a “ghostly” hound in Dartmoor, Sherlock Holmes offers returned to London, and then find himself the mark of the deadly vendetta.

A beautiful client arrives with an account of ghosts, kidnapping and dynamite on a whisky estate in Scotland, but brother Mycroft trumps all with an urgent assignment in the South of France.

Around the fabled Riviera, Holmes and Watson encounter treachery, explosions, rival French Detective Jean Vidocq… and a terrible breakthrough. This propels the duo northward towards the snowy highlands. There, in a “haunted” castle and among the copper dinosaurs of a great whisky distillery, they and their young client encounter mortal danger, and Holmes realizes all three situations have blended right into a single, fatal conundrum.

In order to solve the mystery, the best rational thinker need to confront a ghost from his personal past. But Sherlock Holmes does not believe in ghosts…or will he?