Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent book!

It's almost a cliche but the key to doing well in business is knowing what your customer wants. I've read that line in a ton of business books but this book is the first I've ever seen that actually tells you how to do it! Zhivago gives very practical advice on how to quickly and easily figure out what your customer will pay for -- and thus which direction you should point your business. My only gripe with this book is there's no index. Still, an excellent book which I highly recommend!!!!