This saga, dealing with the exploits of Ragnarr and his sons in the British Isles and elsewhere, gives important insights into Britain's relations with Scandinavia in the ninth century and later. The monograph offers a new etymology for the hero's nickname, lothbrok, and examines in detail the saga's relationship to its Old Norse analogues in prose and verse, its Latin analogue in the Gesta Danorum by Saxo Grammaticus, and its ballad-analogues in Norwegian, Danish and Faroese.