Instruct: Classify the given review into positive or negative sentiment.
Query: Not as good as the last 3, but still worthwhile

I read this book in one siting. Compared with the previous books, it was "lacking", but it is also a necessary link. On the whole, the series has been worthwile (and an excellent read.) Reading about the choices made by the characters has made me question my own choices. I can't wait for the next one!