Bretwalda (The Argosy Library)

'Twas the mightiest weapon the eyes of man had ever beheld; its mystic name meant "Ruler of Briton." And from over the Northern Sea came a Viking's thrall--the only man in the world who could wield that fearsome steel--to save good King Alfred and the homeland he scarce remembered.
Collecting--for the first time--all 12 stories of the Bretwalda saga.
Volume #8 in The Argosy Library.