Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rowling finds another level

I have a question. Who has matured more, Harry Potter, or JK Rowling? What started as a series of children's books, with adult appeal has become adult literature, with appeal for teens. This book has a powerful majesty about it that was only briefly glimpsed in books 4 and 5. The humor and fun is still there, interspersed with tautly written action sequences and some very unexpected development of character and twists of plotline. But, the most astonishing development takes place near the end of the book and hinges on a subtlety of thought and point of view, and with profound effects on the rest of this series. You will need to read these passages several times to grasp the full brilliance of this marvelous author. Brava Ms. Rowling.