opinion on comments about a book on yoga anatomy

Dear Esther and Friends, I have read this outstanding book. The pictures are astounding. How many times have your read a yoga book or watched a yoga video where you were instructed, for example,to bend your leg where your knee should be over your second toe.This does not tell you much. THere are countless ways to use your muscles to achieve this end, whether right or wrong. This book tells you what muscles to contract and stretch in a great graphical display correctly. Everyone should know about anatomy so that they know how to use their body. The majority of yoga instructors have no idea on anatomy and are not aware of each person's unique design.I have learnt so much by reading this book especially how I was incorrectly using my muscles. This book is for beginners and advanced alike. You have to get to know your body and how it works because an instructor does not know how you feel internally. I encourge everyone to buy a book like this and learn about their anatomy. It is not difficult. You need to know how muscles operate in particular pose. It is very important to not just individualise a particular muscle in a pose because there are others working with that muscle.I think Esther's book is outstanding. But what would make it even better would be to show for example how the whole group of muscles work when glidewalking. That is make mention of the quadricep muscles. A suggestion would be to have pictures like the ones in this book. You would learn so much more. Regards   

Dear Esther and Friends, Further to my previous comments, here's the link so that you can preview the books and the accompanying text http://www.bandhayoga.com/ Regards

Forgot to tell you blue muscles are contracting and red muscles stretching. Different shades of the same colour signifies different levels of contraction or stretching. Regards