Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An Unpredictable Tale of Suspense and Action

Comes A Horseman tells the story about two F.B.I. Agents working to find a most frightening and unusual serial killer. In the process of their work, the agents become targeted by the killer and must solve the case before they end up as the killer's next victims. The case seems to be part of something bigger, and eventually leads them to Rome, Italy. The characters are very "real". The pace of the story keeps you interested. The action is written pretty realistically, and without being overly gruesome or gory. I really enjoyed the fact that the story was not predictable.