Instruct: Classify Amazon reviews into positive or negative sentiment
Query: For those who are serious about the altissimo range

This book provides a very good introduction to the overtone series in general on the saxophone, and the altissimo (flageollet) range in specific. Discussion on the usage of imagining the tones before playing them is excellent. Some of the later tonal exercises lack a good pedagogical focus but are useful. Some of the altissimo exercises incorporate too many overtone partials that are typically NOT in tune with Well-tempered tuning. This can cause learning to hear these tones out of tune. Overall, the best book on the market on this subject!