I have the book, and yes I would highly recommend it. But not for the use that you describe.
Here is what is written:
" the Natural classical guitar presents a holistic approach with 10 principles that will help you develop yourself as well as your playing. The basic principle is to let nature support you in every way so that your playing is as effortless as possible. Related principles show you how to practice and perform better by settling your mind, relaxing your body, balancing relaxation and activity, and using your mind to guide your fingers"
Included are specific techniques for nail care, right-hand strokes, fluid left-hand shifting, secure playing of fast scales and more.
This book is required daily reading for me. I have read it 3 times through already. And every time I read it, I pick up something new that I didn't realize was there before.