Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Decent at best

This book is a "by example" style book. It makes up a fake manager in a fake office with fake situations and tries to use that to emphasize its points. This makes it easier to read than a text book, but has the downside of making it both very prescriptive and very limiting. Most of what is recommended will not apply to you unless you fill the same role as the fake manager they follow in the book.That said, the book does recommend some good practices. But over all, I found it to be too focused on special cases and not broad enough for its techniques to be extended and applied in circumstances not specifically addressed in the book.