About the book: 2024 / THE FIRST NOVEL OF THE CULT CYCLE ABOUT THE CHINESE SHERLOCK HOLMES - AN ECCENTRIC MATHEMATICAL CHEN JUE. ONE OF THE BEST CHINESE DETECTIVES HONKAKU. December 19, 1994 Shanghai police have arrived on call to the famous Obsidian Mansion. A quaint black structure that businessman Gu Yonghui bought to fulfill a promise to his young son to live in a fairytale castle. There was a suffocating aroma of perfume in the house. The owner's room was hastily painted red. But the main thing is five corpses on the floor. In front of the police, Gu Yunhui, wearing a bloody robe, locked himself in his room and... disappeared. And five minutes later he was caught... five kilometers from the crime scene. Despite the impossible nature of his escape, Gu Yonghui was found guilty and placed in a psychiatric clinic, where he committed suicide. Twenty years later, his son invites a group of experts to the mansion. A psychiatrist, a forensic psychologist, an illusionist, a physicist and a detective captain are gathered here to re-investigate this mysterious mass murder. And along with them is the brilliant eccentric mathematician Chen Jue, who has repeatedly proven that mathematical methods are very effective in solving crimes. He is convinced that the key to the solution lies in a strange fairy tale that Gu Yonghui wrote before his death... The novel has been translated from Chinese.