From publisher blurb:
The Exciting Sequel to the ENNIE Award-Winning Gods of the Forbidden North has Arrived!
Gods of the Forbidden North is a massive, three-volume mega-adventure series written for the Old-School Essentials: Advanced Fantasy tabletop role-playing game by Necrotic Gnome. It details a campaign setting, a wilderness hex-crawl, a sprawling underworld connecting to multiple entrances on the surface, and most importantly, an enormous megadungeon.
Volume 1: The first book covers the arctic frontier's settlements, cultures, religions, and its vast wilderness regions. It includes 1 urban starter quest and 5 low-level dungeons.
Volume 2: The second book details the underworld below the continent's surface, plutonian settlements, 4 mid-level dungeons, 1 urban investigation adventure, and 1 high-level dungeon.
Volume 3: The third book explores the last undescribed hex on the wilderness map (hex 10.02) that contains the legendary Castle Thar-Gannon megadungeon, its upper and lower halls, 3 mysterious towers, and 3 vast dungeon levels. It also includes the Cyclopean City of Chaos, with 23 unique tower dungeons, plus the secret entrance into the Tesseract of Time.
The 532-page second volume is designed for a heroic party of 6-8 adventurers to begin at 5th level and reach a minimum of 9th level by the book's conclusion, although most parties will hit 10-12th level if all underworld encounters are exhausted. Though the mega-adventure was originally designed as a sandbox campaign, it also supports episodic adventure path playstyles, as well.