The author has collected extensive material on the activities of Soviet intelligence in the 20-50s of the XX century. In terms of the abundance of texture and names, this work even surpasses the sensational book of the English historian Christopher Andrew and the former colonel of Soviet foreign intelligence Oleg Gordievsky "KGB: intelligence operations from Lenin to Gorbachev." According to David Dallin, he managed to tell about the work of the Soviet special services abroad as objectively and accurately as possible in the existing conditions. Some of the events described by the author are truly unique, since they have never been made public before.