As you know, in the twentieth century there were three great detectives - Sherlock Holmes, Hercule Poirot and Major Pronin. The latter can also be considered as an analogue of agent 007 - James Bond. At the same time, Bond novels began to be published in the 1950s, and works about Pronin in the late 1930s. The protagonist of Soviet spy literature, the thunderstorm of all foreign residents, Ivan Pronin, is investigating the most mysterious and mystical crime of the Soviet era.