Three packs of truth, or The vinegar maker's daughter. E-book. Formato EPUB - 9789934820304

1892, Russia, St. Petersburg.
The head of the police department, Pyotr Ivanovich Durnovo, urgently summons Stepan Faberovsky, a former London detective, and Artemy Ivanovich Vladimirov, an itinerant artist, a former agent of the III department, from their exile to Yakutia. He had no choice.
“Yes, I know that among departmental officials, especially from the Third Office, there is a belief that Faberovsky and Vladimirov can do everything. But it's better to sell your soul to the devil than to get involved in any kind of thing with them."
P.N. Durnovo
But even he doesn't suspect what an incredible farce two detective agents will turn this story into.
The Secret Agents series is a posthumous edition of the archive of the creator of the Sherlockian encyclopedia, Svetozar Chernov (Stepan Poberovsky, Artemy Vladimirov). 

Svetozar Chernov is mostly known as an author of ‘Baker-street and its surroundings’. In fact, that encyclopedia of Victorian life was made out of materials authors collected for their adventurous-detective novel. "Three packs of truth, or The vinegar maker's daughter" is the last, most complete book of the series.