Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very helpful book

This book is the second in a series. The first book deals with sight reading for the guitarist at level 1to 3. The current book covers levels 4 and 5. Both books are absolutely superb in teaching how to read music. But it is important to emphasize that one needs to be capable of handling the material in the first book before attempting to learn from this book. I particularly like the way this book covers the higher positions. The explanations and exercises are just about perfect. Highly recommended.