I do not know that book but I would suggest going here www.dragonsociety.com.
The site is owned by Rick Moneymaker he is known for his ability to explain PP and how to apply the five elemets to increase the results.I train this style under one of his students and take five hour seminars with him every six weeks. There are several books and videos that he sells that are very good, but check the seminars and I would try to attend one of them he knows the science behind the nervous system, muscle system etc. as good as any doctor I have met. He goes from the traditional chinese medicine/accupreassure side and explains it so that it makes sense in real life applications. I suggest this because knowing the affect is not going to help if the angle of the strike or the setup strikes/grabs are not correct.
The above is my own humble opinion. hope it helps
train hard , train often