The Worm Ouroboros is a
heroic high fantasy novel by
Eric Rücker Eddison, first published in 1922. The book describes the protracted war between the domineering King Gorice of Witchland and the Lords of Demonland in an imaginary world that appears mainly
medieval and partly reminiscent of
Norse sagas. The work is slightly related to Eddison's later
Zimiamvian Trilogy, and collectively they are sometimes referred to as the Zimiamvian series.