Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Great Little Book

I was fortunate enough to pick this book up used at the Mises Institute, in Auburn, AL last week for $3. I now see why it's listing here on Amazon for $99+, and I will not part with it. It's a wonderfully, simply written volume on the phenomena of increasing nominal wages, and covers many contributing factors. From the free-market perspective, F.A. Harper easily demonstrate's Menger's theory of Marginal Utility without ever noting the Economist or his theory.The beauty of this book is in its simplicity - I'd recommend it to any aspring economist or economics student.