Richard Morton Koster (1934) is an American novelist best known for the Tinieblas trilogy—The Prince (1972), The Dissertation (1975), Mandragon (1979)—set in an imaginary Central American republic much like Panama, the author's home for many years.[1] He is the author, besides, of two other novels, Carmichael's Dog (1992) and Glass Mountain (2001), and (with Panamanian man of letters Guillermo Sánchez Borbón), of In the Time of the Tyrants (1990), a history of the Torrijos-Noriega dictatorship in Panama.