Instruct: Classify Amazon reviews into positive or negative sentiment
Query: only for beginners

I decided to return this book after only the first 30 minutes of thumbing through it. The book is well laid out and out of most of the books I've read concerning this subject, the author is very easy to understand and follow which makes it all the worse that the book didn't have more content dealing specifically with tuning (working with timing and fuel) of turbocharged applications and other aspects of such modifications. I agree with another review post stating the run-down of products offered out there currently in regards to engine management options and their pros and cons was excellent. Thus my review of how this book should be the first one someone buys that is just now getting into the subject.