Given the task definition and input, reply with output. Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

It was a pretty good Sci Fi book. When taken as a series, there are some great twists and turns. I liked the bio-enhancements that the characters get. The concept is very interesting to think about. There is a theory on how the human race came to earth, as well as a war going on in space unknown to those on earth. I think that any Sci Fi fan will enjoy reading this story.
Positive