I was one of those professional musicians -- and there are a lot of us out there! -- who didn't know very much about music theory. Music theory's for college cats, dig? Then I started giving lessons, and I figured I'd better know what I was talking about. So I bought this book. Edly makes music theory charming, funny, and interesting with a combination of explanation, practical example, and humour. Believe it or not, this book is hard to put down once you get going. For me, much of the book was a revelation of "Oh, so that's what I've been doing!" than any new information, but it's great to be able to understand and talk about music on a deeper level. The book is geared towards jazz and blues players, but the information is easily adapted to any genre. A must for anyone, from beginner to professional, who wants to deepen his understanding of western music!