Great book for anyone wanting to get behind the science of punches, kicks and strikes. As an instructor it can be used to reinforce/teach correct power generation and technique - a lot of it we already know but this book provides the science behind it. As a student it can be used to better understand how to move and perform techniques efficiently - you can also check to see if your instructor is on the right track too (never blindly follow what your instructor is saying - make them prove it to you). Not seen any book like this on the market. Some of the "mathematical" areas can be a bit heavy going - but it is a book explaining the science - so while it might not be something you think about again, it is good to know that every detail has been covered. Applicable for any martial art really!