Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Number one reason Amazon should allow zero stars

I bought this book while in a hurry in Costco, not from Amazon. Wasted my money. I'm a big reader of nutrition, natural cures, etc., so when I saw this title I grabbed it for some light reading on vacation. The entire book can be condensed to a 3 page pamphlet. Don't take OTC or prescription drugs, doctors are quacks (I happen to believe most are), you need to cleanse regularly, blah, blah, blah. No, and I repeat, no substantiation is provided anywhere between the covers. Having already stolen your money for this pile of cr@p he calls a book, he continually hawks his web site where you can pay even more money to learn the "secrets" he alludes to in the book. If you buy it, you only have yourself to blame. This is the last time I buy a book on the spur of the moment without checking reviews. Many, many reviews of this book would have steered me clear of this piece of junk. Please don't give this con man any of your hard earned money.