A battle to the death with six-hundred-year-old zombie Vikings in the frozen far North was just the beginning... Undercover activist Jane Harper and father-and-son whalers Jakob and Willem Olavson thought they sent the walking corpses to their graves for good, but the intelligent parasites controlling the dead flesh lived on to keep fighting--and infecting. Now Jane's Nordic allies and a motley crew of mates are shoving off on a new monster-killing...