The books included in the series were created on the basis of the notes of the actual state councilor for the police department of Tulin, Evgraf Mikhailovich. The plots of the books immerse the reader in the search for stolen drawings, treasures, counterfeiters and unique horses.

1. Georgy and Olga Arsi: The case of the eunuchs sect. Historical detective Evgraf Mikhailovich Tulin, when he was a detective in the Moscow detective unit, had to unravel a tangle of intrigues associated with the theft of secret drawings of a new weapon at the Imperial Arms Factory in Tula. Face mysterious deaths, mysticism, deception and inexplicable situations. The policeman's opponents were sectarians from the famous Skoptsy community and the international swindler Savin.

2. Georgy and Olga Arsi: Treasure of Belevsky Khudeyar. Historical detective The plot of the book immerses you in the search for a 16th-century treasure hidden on Tula soil by the boyar Tishchenkov, called the robber Khudeyar in legends. At the same time, in 1882, a gang of convict murderers and a descendant of Khudeyar who escaped from custody are hunting for the treasure. To search for criminals, detective Tulin is forced to infiltrate the lives of the homeless and, thus, confront the criminal world of the city.

3. Georgy and Olga Arsi: The Curse of the Old Landowner. Historical detective story The plot of the book immerses you in the search for stolen unique horses belonging to the head of the city of Tula. During the search, the truth about the death of the old general, the madcap landowner and his wife becomes known. The man responsible for a murder that happened forty years ago becomes the target of revenge. The descendants of the murdered old man take revenge for his death, regardless of the moral norms and laws of the state.

4. Georgy and Olga Arsi: Whale Marina. The legacy of Ataman Pugachev. Historical detective story: The murder of a jeweler who was selling ancient gold imperial coins leads detective Evgraf Tulin to the distant Ural town of Satka. It was there that counterfeiters, various sects of schismatics and dashing people settled. During the investigation, the detective unravels an ancient story connected with a descendant of the famous Ataman Pugachev, who became the heir to an ancient treasure.