Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some of the best science journalism I've seen

I highly recommend Oliver Morton's Mapping Mars. Not only does it frame the debate about the likelihood of life on Mars, but also does a great job of explaning our changing understanding of the planet.It also conveys a sense of Mars as a real place, and discusses how the meaning of Mars changes depending on our sense of whether or not we think there is life there.Finally, it asks a crucial question: what do we mean by "nature" and how tied up is that notion with "life"?And it has cool pictures.