The trilogy by A. Bezuglova and Yu. Klarov includes three detective stories: “The End of the Khitrov Market”, “In the Exclusion Zone”, “Assassination”, which are united by one main character - the security officer Beletsky. The story “The End of the Khitrov Market” describes criminal events taking place in 1918–20, in “In the Right-of-Way” A. Beletsky is entrusted with the responsible case of the murder of a man in the right-of-way of the railway. The novel “Assassination” completes the trilogy. In a tense atmosphere, Beletsky is investigating the case of an attempt on the life of a responsible employee.