If there is any link to this book its the following.
As the synopse describes johnson hunts down the beasts of the forests in his quest to end the beasts he finds resistence from one fort. So he declares war on them after having taken the fort they see these evil knights where keeping the beasts in cages creating hybrids releasing them into the wild to keep their power as beasts slayers and sway over the common people.
Yea there is a real link to russis us bio labs and fucking covid in the story