Gunard Hjertstedt (March 28, 1904 â January 9, 1969), better known by pen name Day Keene, was an American novelist, short story writer and radio and television scriptwriter. Keene wrote over 50 novels and was the head writer for radio soap operas Little Orphan Annie and Kitty Keene, Inc. Several of his novels were adapted into movies, including Joy House (MGM, 1964) and Chautauqua, released as The Trouble with Girls (MGM, 1969).