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. The work is slightly related to Eddison's later Zimiamvian Trilogy, and collectively they are sometimes referred to as the Zimiamvian series. The Worm Ouroboros is written largely in sixteenth-century English, a nearly unique approach among popular fantasy novels; with Eddison making use of his experience translating Norse sagas and reading medieval and Renaissance poetry. Eddison also incorporated a number of actual early modern poems into the story, including Shakespeare's 18th sonnet, all meticulously credited in an appendix. The book was illustrated by Keith Henderson, who also illustrated books by Geoffrey Chaucer and W. H. Hudson. Source: Wikipedia (en)