Wild Hunt investigator's notes

 is a book that contains notes from years of research into Wild Hunt. It is found in the dwarven catacombs in Vergen (on a corpse with candles lit near it, behind the breakable wall)

Contents
I spent all my life researching the Wild Hunt and without false modesty I can say I read everything that exists on the subject. Furthermore, I saw the wraith gallopade with my own eyes three times. I managed to perform quick measurements on the second and third sighting and I actually examined the observational material in detail. Based on my knowledge and experience I came to a crushing conclusion: I am certain that there is a terrifying, alien force behind the hunt. A mind completely mad, yet still a mind, not pure chaos. I firmly note that the wraith raiders are someone's or something's, emissaries and their deeds are governed by a Plan