Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A fantastic first two-thirds of a book

I've been looking for a new sci-fi author and Scott Westerfeld is at least in the running after reading this; he has assembled a creative and unusual galaxy for his Succession trilogy(? I think it'll be a trilogy) and has good characters, technology, and background. My only complaint about this book, and I've seen it echoed elsewhere, is that is it doesn't have a really gripping climax and denouement at the end; the end feels somewhat chopped off. I expect SOMETHING to serve as a hook to the next book in the series, but it really feels like he's still just warming up the story. Having said that, it's a ripping good story so far; I've already ordered the next in the series.