From publisher blurb: The Megadungeon Monster Manual is a fantasy role-playing game supplement for Barrowmaze, The Forbidden Caverns of Archaia, HighFell: The Drifting Dungeon, and Dwarrowdeep. The book brings together the most fearsome monsters from these megadungeons and combines them into a single volume. The Megadungeon Monster Manual will keep your players on their toes and your campaign going strong for years. The MMM is brought to you by the Old School Renaissance (so don’t forget your 10’ pole).