The Worm Ouroboros is a heroic high fantasy novel by English writer E. R. 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.
Eric Rücker Eddison (24 November 1882 - 18 August 1945) was an English civil servant and author, writing epic fantasy novels under the name E. R. Eddison. His best-known works include The Worm Ouroboros and the Zimiamvian Trilogy.