Unknown Monstrosities

Monstrosities are incarnated from the same stuff nightmares are made of. A strong concentration of evil festers in the void of where a soul should have been. Their actions often pursue the end of life, or else what are they chasing? What rotten purpose are they trying to serve while spreading paralyzing fear? And why are they not content with the living world that they must also terrorize the realm of our dreams? This quest is dangerous, this time you're on your own, good luck.

Add books you've read that feature a horrible nightmarish monster.