Robert Arthur Jr. (November 10, 1909 – May 2, 1969) was a writer and editor of crime fiction and speculative fiction known for his work with The Mysterious Traveler radio series and for writing The Three Investigators, a series of young adult novels.Arthur was honoured twice by the Mystery Writers of America with an Edgar Award for Best Radio Drama. He also wrote scripts Alfred Hitchcock's TV show, Alfred Hitchcock Presents. Source: Wikipedia (en)