Joanne Rowling (/ˈroʊlɪŋ/ ⓘ ROH-ling;[1] born 31 July 1965), better known by her pen name J. K. Rowling, is a British author, philanthropist, producer, and screenwriter. She is best known for writing Harry Potter, a seven-volume series about a young wizard which is the best-selling book series in history, with over 600 million copies sold. She also writes Cormoran Strike, an ongoing crime fiction series, under the alias Robert Galbraith.