From publisher blurb:
Shunned by the gods and consumed with avarice, foul infernal dwarves roam the very depths of Aventyr’s subterranean realm, ensconced with the devils of HEL—the gitwerc! Empowered by a dark pact made during the Forging of the Dvergr, these despicable denizens of the Underworld gather souls for their counterparts in HEL. Of all the many dwarves of Aventyr, none are as feared and dangerous as the gitwerc!
What lurks above HEL in the lands of the gitwerc?
A brand new player race, an innovative take on dwarves unlike any other!
Favored class options for all Pathfinder core classes!
New equipment!
Despicable magic items like the blood candle and HELfire ash!
Feats of subtle dangerous import and abhorrent means!
Spells guaranteed to terrify the foes of these dread dwarves!