Instruct: Classify Amazon reviews into positive or negative sentiment
Query: extremely helpful book

I've used this book as a text in my course for years now - it is one of the most practical and balanced books on the topic out there. The only reason that I don't give it five stars at this point is that some of the research and examples are a little dated now after almost a decade of being in print - esp in the first chapter. But all the concepts are still very helpful to think about, esp the chapter on the family and work balance.