Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Longest (and most boring) of the series

Hey, I'm no Harry Potter maniac, but I really dig reading the books when they come out. They are so much fun! I've read several of them more than two or three times. It's been a satisfying series.Until book 5.Five HUNDRED pages of nothing happening. Five hundred.I don't care if Harry became kind of jerky. He's a teenager. It's only appropriate. That wasn't my problem with this book.The previous books have been action packed, funny, and interesting. This book just drags and drags, and it actually becomes painful to read at some parts.My only hope is that it was an inevitable bridge to the next, more interesting book.