Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Suspenseful Simak

I've read almost every book by Simak that I can get my hands on and this is one of the best.It is unusually focused for one of his novels (there's not that much divergent strangeness for the reader to accomodate compared to, say, the Goblin Reservation), but it has a tangible mood/feel that sucked me in and made me finish it in an afternoon.Plus, it is short. Short books are good things.Unusually enough, I think it has a similar feel to much of what has been written in X-men titles over the years, with the focus being on anti-paranormal hysteria among the public.