Лабиринт Ванзарова

Late 1898. Petersburg is agitated: the machine of fear is gone, a new invention that transcends the boundaries of science is needed. The reason is too important: there is no heir to the throne. Who knows, perhaps the new device will be useful to the imperial court. The hunt for the machine of truth begins, during which the inventor's wife perishes... Rodion Vanzarov is the only one among the investigators capable of unraveling the intricate mystery, but will he be able to withstand the influence of secret forces this time and expose the plot of dangerous criminals?