Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Music Theory Book!

I am a guitar player of 11 years and bought this book to refresh my memory on a lot of the forgotten (and quite possibly never learned) things. This book is amazing when it comes to explaining all aspects of music theory. I never liked learning music theory and simply forced myself to find some fun in it because most of the books out there are boring and hard to understand. My only complaint was that when he talked about Suspended chords, he only mentioned the 4th and not about Suspending the 2nd.