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

This book is excellent. In my opinion, the best characteristic of the book is that it is easily understood. The book is divided into 3 sections. Each section contains 29 lessons. Nearly every lesson concludes with a set of exercises that effectively reinforce the information the lesson provides.Since reading John Brimhall's book, I've started reading another music theory book for beginners, and the difference in how easily understood John's book is in comparison to the new book is remarkable. John's book blows my other music theory book out of the water, as far as being an effective teaching tool for beginners is concerned. If you are new to music theory, as I was before reading John Brimhall's "Complete Theory Notebook", then this is the book for you.