D&D 5E: Grim Hollow: Raider's Guide to Valika

Raider’s Guide to Valika is a 180+ page setting book that takes you through the brutal Valikan Clans region in the north of Grim Hollow’s continent, Etharis, in stunning detail.
It also includes a vast amount of new 5th Edition mechanics for both players and GMs alike such as Raiding subsystem mechanics, brand new Martial Class Maneuver rules, gritty Survival rules, two new Transformation rulesets, advice for running norse inspired games, brand new Subclasses, Clan Specific Traits, and new Advanced Backgrounds.