Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Keller is a decent guy despite his job

I really enjoy this series. In the fiction market it's rare to find even 1 book that dares to step outside the usually well-defined boundaries of 'the usual' and when you do find such a rarity, it almost always misses its mark. The Keller mysteries not only step outside the usual boundaries and hits the mark but it does so with aplomb. They are a delicious telling of what it would probably be like from the hitman's point of view. Added to this is the fact that Keller simply isn't that bad of a guy. He just has an unusual job that he happens to be very good at.