This is very sound teaching from a very experienced master of real, root- deep Taoist Chi Gung. It is a step by step manual, and if you have done any Chi Gung already, it puts everything in context both historically and in terms of explaining the why and how of each exercise. It is rather not about martial arts, but about inner strengthening, balance and mind/body/spirit harmonisation which is the basis of all true martial arts training, but also the key to good health and longevity generally.
For the beginner, it provides the best possible start, (and there are contact details at the back for you to find a teacher, which you should do asap).
Even if you just do the breathing exercises, the result is pretty life changing, as they restore energy levels and dissipate fatigue in a matter of weeks.
If you follow this book in depth and read the Tao Te Ching at the same time, it all starts to come together, the one gives insights to the other.