Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Pure SF, Pure Action, Pure Fun!

It's a wonder nobody ever thought of filming Bester's books, for they have an effect much similar to that of a good movie - they rock you in your chair. Decades before anyone thought of the term "Cyberpunk", Bester already had his own view of the future, which happens to be very similar to the present - our present, the future present, even Bester's present. That is, of course, no accident, for Bester never forgets he's dealing with people, not machines - a fact which doesn't prevent the book from being filled with action, fun, (weird) technology, immortal people (among them an original neanderthal), an eccentric alien, and even some more conventional SF elements, such as The Mad Professor and a Time Machine.Brilliant dialogues, thrilling action, unforgettable characters... In short - don't forget to get your hands on that one as soon as possible. I'm sure you won't forget to thank me for that advice...