Monstrum, or a Portrayal of Witchers. Volume 1

In truth, there is naught more repulsive than these monsters that defy nature and are known by the name of witcher. They are the offspring of foul sorcery and witchcraft. They are veritable scoundrels without conscience and virtue, unscrupulous creatures of hell able only to take lives. They have no place amongst decent and honest folk.

And this keep, this Kaer Morhen where these villains nest and practice their foul rituals must be wiped from the earth, all traces of it treated with salt and saltpeter to complete the deed.