The continuation of the legendary adventure series from the New York Times bestselling author. In bad times, historian Jeremy Logan arrived at a boarding house in the famous nature park to complete a monograph on medieval heresy. Strange murders are being committed in its wilds, and it is absolutely unclear who could attack the victims and tear them to pieces: either a bear, or wolves, or a person obsessed with perverted cruelty. Neither version seems suitable. And only the forest ranger Randall Jessup participating in the investigation knows that his old university friend Jeremy is not only a historian, but also an enigmatologist, a specialist in solving inexplicable mysteries in any, even the most difficult conditions. His help in this matter is the only way to find out the truth...