Homicide Trinity is a collection of Nero Wolfe mystery novellas by Rex Stout, published by the Viking Press in 1962. The book comprises three stories: * "Eeny Meeny Murder Mo", first published in Ellery Queen's Mystery Magazine #220 (March 1962) * "Death of a Demon", first serialized in three issues of The Saturday Evening Post (June 10, 17 and 24, 1961) * "Counterfeit for Murder", first serialized as "The Counterfeiter's Knife" in three issues of The Saturday Evening Post (January 14, 21 and 28, 1961)