Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A book of unsupported opinions presented as fact.

Before reading a book of non-fiction one must aska simple question: does the author know what heor she is talking about? Bob Larson, who never managed to graduate from a divinity school, feels he's in a position to question and ridicule the late, great Dr. Carl Sagan. If you want to learn about the possibility of UFOs would you want the insight of someone like Dr. Sagan, or would you question a fundamentalist pesudo-Christian radio broadcastor with no credentials? It's your call.