Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not up to JK Rowling's standard

This book was, sadly, quite disappointing. Order of the Phoenix left me with high hopes after having such a spectacular finale. But the mysteries of the Department of Mysteries, the mirror, and other good aspects one would expect to pop up did not. Instead the book was heavily dominated by characters pairing up together as their hormones apparently became more important than the war itself. A lot of the relationships felt cliche and unbelievable... just thrown together. There was good characterization of some characters like Snape, and the final battle was quite intense, but I was sadly let down by this book after seeing how outstandingly wonderful (and far more memorable) books 3-5 had been. It felt like J.K. Rowling handed off the writing in HBP to someone completely different at times.