Joanne Rowling, 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. The Harry Potter series is the best-selling book series in history, with over 600 million copies sold worldwide. Beyond Harry Potter, Rowling has also written Cormoran Strike, an ongoing crime fiction series published under the alias Robert Galbraith.