Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't deliver the goods

This book doesn't reveal any secrets,or for that matter much information. It is rather long on OBD II theory and has a fairly good chapter on scan tool selection but falls far short in the diagnostic department. I had hoped this book would have information on acceptable sensor values, troubleshooting / diagnostic charts, etc. As far as diagnosis goes, this book is just one small step ahead of a trouble code chart. Since most of the newer scan tools incorporate this information in the tool itself I would recommend that you save the price of this book and apply it to a better tool.