Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's just plain bad...

I enjoyed the first four books in the series, but this one was just awful. It's far too long, short on ideas and humour, and the attempt to make Harry a teenager is unsucessful. The Voldemort story doesn't get anywhere, and the 800 pages drag along.As for the new characters, JKR is trying too hard to please her supposed audience. A "cool" young woman wizard with pink hair, a black wizard etc...as for Harry's girlfriend, please, what's the point? Teenage themes are catered for in different books - we don't want them in the Harry series, particulalrly if they're done so badly!I fear for the last two books in the series, unless JKR can perform a U-turn and get back to the original stlye that made the first four so readable.