About the book: 1978 / A new story by the Siberian writer Mikhail Chernenok is adjacent to his stories, forming the cycle “The investigation has established” (“The secret of the old well”, “Entrusted to the criminal investigation ", "Kukhterinsky Diamonds", "Bet on Losing"). The author talks about a complex and confusing case, which criminal investigation officers Anton Biryukov and his assistants managed to solve. The story “Shaman’s Gar” is one of the writer’s first works.