What is the secret formula for love?

Hector, our intrepid psychiatrist, sets off on a new globe-trotting mission – and this time he's looking for LOVE. 

These are difficult times for Nicolas Le Floch: Louis XV is dead and Nicolas's boss Sartine has been promoted to Minister of State for the Navy. Le Noir, Sartine's successor as Lieutenant General of Police, distrusts Le Floch. Monsieur de Saint-Florentin, the King's new minister, entrusts Commissioner Le Floch with the investigation into the murder of a chambermaid whose throat was cut in unusual circumstances at Saint-Florentin's home.

In the spring of 1932, with Londoners terrorised by a series of brutal murders, the private detective agency of Messrs. Singleton and Trelawney quietly opens its doors in Bloomsbury.

The first person to call on their services is a worried Lady Arthur Conan Doyle. She tells of mysterious events at 221 Baker Street - and a premonition that the London murders signal terrible danger for mankind.

The fifth Victor Legris Mystery.

In the turbulent Parisian summer of 1893,Victor Legris has vowed to give up the dangerous hobby of amateur sleuthing to concentrate on selling books.