Its like any number of period "martial" books found in China, Japan etc.
The basic problem is the same one that they all seem to have.
They only show/list static positons with little indications of how they got to those positions or how to get to the next one.
They are more or less "notes" for people that already "know" what is going on.
A "diagram" to be used by folks that already "know" the sequence.
Its of little use to people that don't.
It would be like me handing you several pages of drawings from a totoaly unfamiler "style."
You might see things that "look" familier--certian postures and hand postions etc.
But without knowing the specifics of the style--you would simply have no clue as to how they were supposed to be used.
The principles involved, the fundamentals the techniqes are based on, in what situation they are to be used. etc.
You can't learn martial arts from a "new" book---you can't learn any better from an "old" one.
Interesting text----they all are.
Just don't get caught up thinking it means more than it does.
Just a tip--and probably worth every penny you paid for it--exactly nothing