The term 'Queen of Mystery' is a title given to the American author Ellery Queen, who wrote mystery novels and short stories. Ellery Queen was the pseudonym of two cousins, Frederic Dannay and Manfred B. Lee, who wrote together under the same name. They were both highly successful authors, and their works have been adapted into films, television shows, and radio programs. Ellery Queen was also the name of the main character in their works, a detective who solved mysteries with his father, Inspector Richard Queen.