Given an English language product review, determine if it is a Good Review or a Bad Review. A good review is one where the product's review has positive tone and Bad review is one where the tone of product's review is negative.

The book is an excellent reference. However, the kindle version of it sucks. There are no maps or a way to turn text into pictures without taking you back to first page. I can look up info on maps by myself - but there's gotta be something. What good does this add for me if I can't refer to?? Not very happy.
Bad review