About the book: 2015 / By the middle of the 23rd century, the development of technology will make history an exact science, and a group of researchers will decide to reveal the secret of the treasures of the Grand Duke, who was the first in the North-Eastern Rus' decided to fight the power of the Golden Horde. But instead of a peaceful expedition, the participants in this enterprise will face a difficult military campaign in 1252, where heroism, despair and betrayal coexist..