From publisher blurb:
The Empire reached across the Shield Mountains to claim the lands beyond as its final expansion, adding to its territory nearly half of its lands again. The Northern Reach, a place thick with old magic, faerie ruins, and strangeness, a place bordering a desert so vast, so toxic that none have ever explored it fully, this final province offered granted the Empire a buffer to the darkness beyond its borders and a resource-rich landscape, perfect for plunder.
Shadow of the Demon Lord uses the Northern Reach as the primary setting for adventures set in the game and offers a broad overview of the lands and its peoples. This supplement, the first of several parts, uses the information in the rulebook as a starting point and expands on the information to offer new mysteries, new adventures, and new threats, all to bring this place into new focus to ensure it offers opportunities for many campaigns.