I purchased the ?Little Black Book of Scales? to practise some new scales and to improve my guitar-skills. Knowing some scales makes it much more fun to jam along to some backing tracks and so does practicing. The book offers all of the important scales in different keys and also in different styles. It?s not needed to be able to read notes, all scales are also shown as tabulature. I would recomment this book for every guitarist that wants to practise some scales and to every beginner because all of the cales are depicted in a clear way that makes it easy to understand how to play the scales.