The World Underground

The World Underground is a book in that, when read, provides bestiary entries for nekkers, rock trolls and ice trolls, as well as the formula for nekker warrior decoction and the formula for troll decoction.
It can be purchased from the following merchants:
* Marcus T.K. Hodgson in his shop on Hierarch Square
* Books merchant in Hierarch Square
It should also be available as random loot, but due to a randomization bug never appears as such.
== Journal entry ==
: We hunkered down for the night in a cave so enormous the light from our torches faded into the murky black without revealing any upper bound to it. For most of the night, all we could hear was the rushing of water somewhere behind the wall of the cave. Yet after some time (it is hard to say how much, for we had lost all sense of where day ended and night began) we heard a sort of scraping noise, and then the sound of boulders shifting.
: The scraping turned to a roar, but by that time we were already on our feet and running towards the tunnel through which we had entered the cave. We did so none too soon, for the shifting had opened up a new passage in the cavern, which began to spew out hordes of small, misshapen humanoids. Without breaking stride I looked over my shoulder, and in the midst of the mass of midgets I spied the outline of a large, black troll.
: Thus began our run for our lives.
Category:The Witcher 3 books
pl:Podziemny świat
ru:Подземный мир