Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A disappointment but still relevant book

I have read Deborah Tannen's first 2 books and I found them groudbreaking and very informative. This book however seems to be too much of a rehash of her first 2 books with a little bit of business communication stuck in the middle. I was disappointed by the book and believe there are better books out there than this one.