Instruct: Classify the given Amazon review as either positive or negative.
Query: Doesn't deliver the goods

Readers would buy this book assuming that they will be able to master the concept of volatility, and use it in their options trading, but this is far from being the case.One would expect a book that deals with an advanced concept such as volatility, to take it as a given that the readers are already familiar with all the basics such as "an option gives the buyer the RIGHT not the OBLIGATION" etc.I estimate that about 2/3 of the book deals with such beginner stuff.On top of that, the authors don't even try to conceal that their primary purpose in writing the book is to deliver traffic to their premium web service.I did learn a few things about volatility, but I was left with the feeling that I was tricked