About the book: 2019 / Troubled on the banks of the Oka. The insidious horde of Khazars besieged the Volnoe fortress, behind whose walls a family of Polian farmers had taken refuge. Bek Shamat thirsts for fierce revenge, because not long before this, a selected detachment of nomads led by the son of the leader died in these places. The Khazars are preparing reprisals for the glades, counting on a quick victory and rich booty. They are confident that the defenders of the fortress, peaceful workers, will not be able to repel the ruthless army of the steppes. How do they know that shortly before this, an unusual and very formidable weapon appeared among the clearings. It's time to try it on uninvited guests…