Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too much fun

I was worried when I started reading this 5th book in the HP series that it wouldn't stand up to the others... I soon realised I had nothing to fear... JK Rowling once again submerges her readers into a world filled with fantastic adventures... I was so sad to finish the book... I'll probably be 25 by the time the next one comes out...