Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's not just about the piano......

.....it's about the battle between following the concepts of Pythagoras and ancient Greek philosophers and the quest for a uniform tuning system that would ultimately bring us to the invention of the piano. Along the way you'll discover how this influenced philosophers, musicians, inventors, artists, scientists, religious and political leaders, Kings and Queens, from Europe to China and everyone in between.I highly recommend this book, especially to any one who is involved in teaching music.