Instruct: Classify a review into positive or negative sentiment.
Query: Awesome - hard to put down

This was a great read. The book just seemed to fly by and was difficult to put down. It will definitely eat into your sleep time! I thought he did a good job explaining the NASA words and taking everyone "inside" NASA. The characters behaved like real people - you could imagine a person behaving this way or that way. It was a good story and I hope he writes some more books that are just as good in the near future.