From back cover:
Dwarven Destroyers march across Midgard, laying waste to all before them. Brave human warriors abandon clan and holdfast to bond themselves to the bones of dead giants, hoping to push back the Destroyers. The Runescribed harness the magical power of the sacred Runes, wielding magics that could level cities. Seers advise and divine the future, but the fate of the world is murky and dim. Jarls, thralls, and warriors fight in common cause, shouting “victory or Valhalla!” as they charge into battle. Ragnarok has come. The War of Metal and Bone. Will you dine with the gods in Valhalla, or dance with the dishonored dead? Choose your fate.