Saga of Grettir the Strong by Unknown

The Saga of Grettir the Strong is a thirteenth-century Icelandic saga about Grettir, the longest-enduring outlaw in medieval Iceland. Its monster fights and sorcery have inspired many people with a love of Icelandic sagas, and its depiction of the undead has influenced later portrayals of Viking monsters.(Summary by Alison Sawers)