Mildred Wirt Benson (July 10, 1905 – May 28, 2002) was an American author of children's books, in particular several Nancy Drew mysteries. Writing under Stratemeyer Syndicate pen name Carolyn Keene from 1929 to 1947, she contributed to 23 of the first 25 originally published Nancy Drew mysteries. She was one of 28 individuals who helped produce the Syndicate's Nancy Drew mystery books from 1929 to 1984. Edward Stratemeyer hired Mildred Benson in 1926 to assist in expanding his roughly-drafted stories with Syndicate directed, juvenile text in order to satisfy increasing demand for his series.