Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A good book.

Gleick provides the reader with a first hand glimpse into the world of chaos theory. Time will tell if this mathematical construct will find an application in the physical world other than artistic renditions for computer screen savers. In the interim, we should all be wary of psychoanalysts, new-age theologians and other psuedoscientific types who are quick to wrap themselves in this discipline in an effort to give themselves an aura of respectability.