This is a serious book on Jazz theory and it would be a difficult and dull read for a beginner unless they were using it with the help of a tutor. However, there is plenty of written explanations and advice alongside the hundreds of examples of scales, patterns, and progressions. So this book is more than collection of exercises to play and practice.
The music examples are notated in the style of a fake book which means that it appears on the page to be handwritten. This can be difficult to read if you are not used to it. Also, the examples are not notated in every key. The reader is expected to follow and understand the pattern in a couple of keys, then transpose the patterns into the remaining keys in order to play them. This is particularly challenging for a beginner, but is a great learning exercise. If you just want to follow the notes then this is not the book for you.
A useful feature which is not found in many music practice books is the numerous references to tunes or other books so you can learn and explore topics even further.
This book should be interesting for a musician looking for technical and theoretical solutions to use in their repertoire, but requires diligent study
This book, recommended to me by my sax teacher who is a fine improviser and used and uses it still, is just the thing if you really want to improve your facility and speed. It is not for the fainthearted though. Only buy this book if you can give some regular time and are prepared to keep at it a bit. The good thing about it is that it is progressive and will eventually cover the ground you need. But it will take a long time to work through it properly.