Running of the shower

The doctor was sure: this girl, represented by Ariadn, ordinary crazy. I read the first part of the historical novel of his ward, the famous writer Derzhavin-Kleopatrov, about the return of the Jack-Rights, and she was visited by a vision-a murder committed by a follower of the famous criminal today. But it soon became clear that Ariadne was not deceiving: the murder happened and was furnished exactly as she described! The unknown copied the invented events from the novel published in parts, and the personality of the maniac from the fictional universe could become the key to the disclosure of the crime in the present. But Derzhavin-Kleopatrov stubbornly hid who would be a killer in his book