Both novels by the famous Russian writer Andrei Belyanin “The Secret Investigation of Tsar Gorokh” and “The Black Mass Conspiracy” are united by one hero - junior police lieutenant Nikita Ivanovich Ivashov. By the will of fate or chance, Nikita Ivanovich finds himself in the times of Tsar Gorokh, where he is entrusted with the position of detective governor, and the police department under his leadership is quartered in Baba Yaga’s mansion. Oh, and police work is not easy! And even more so under Tsar Gorokh...