Given the question: Information: - Mistress of Mistresses is the first novel in the Zimiamvian Trilogy by Eric Rucker Eddison . First published in 1935 , it centers on political intrigues between the nobles and rulers of the Three Kingdoms of Rerek , Meszria and Fingiswold , following the death of King Mezentius , an extraordinary ruler who has held sway over three kingdoms mainly through force of character . Dissolution of the realm seems certain as alliances are formed and begin to intrigue against each other . The character of Lessingham is an unknown quantity , with a strong character of his own , but the reader is kept uncertain over what impact Lessingham can have over the future of the realm until the novel 's close . First of the Zimiamvian Trilogy to be published , Mistress of Mistresses is chronologically the last novel in the series . - The Worm Ouroboros is a heroic high fantasy novel by Eric Rucker 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. - Eric Rucker Eddison, CB, CMG (24 November 1882 18 August 1945) was an English civil servant and author, writing epic fantasy novels under the name E. R. Eddison. His notable works include "The Worm Ouroboros" (1922) and the Zimiamvian Trilogy (1935-1958). - The Zimiamvian Trilogy is the title given to a collection of three novels by the author E. R. Eddison. Given the information, choose the subject and object entities that have the relation of 'instance of'.
The answer is:
mistress of mistresses , book