J.K. Rowling announces new book; Harry Potter fans react J.K. Rowling announces new book; Harry Potter fans react an article J.K. Rowling announces new book; Harry Potter fans react J.K. Rowling announces new book; Harry Potter fans react J.K. Rowling announces new book; Harry Potter fans react J.K. Rowling announces new book; Harry Potter fans react.  J.K. Rowling announces new book; Harry Potter fans react. J.K. Rowling announces new book; Harry Potter fans react. J.K. Rowling announces new book; Harry Potter fans react