I started learning the baritone saxophone now a year and a half. I wanted to get a clear idea, structured on different currents in jazz. I knew some musicians, but had trouble locating them in the jazz galaxy. This book helped me to clarify my knowledge on the subject. I loved the simple but comprehensive and clear structure of the book. It might have - he could have some musical theory a bit further data than those presented. But remember that this is an introductory book, intended for those who have not necessarily musical culture. One might regret that there are not more pictures of musicians. This is certainly a book that I recommend to anyone interested in jazz.