Books on Yueh Fei's 18 Continuous Postures

[altiora]

Would dearly like some help finding a good book or two on Yueh Fei's 18 Continuous Postures.

 

Have searched high and low yet can't for the life of me locate any books discussing the theory and practise of these movements. Peculiar given they are foundational.

 

I am wanting the technical information to refine my practise.

 

There are youtube clips but none has the information level I am looking for.

 

Can anyone tell me the titles of books that discuss the postures?

[joeblast]

the same Yue Fei that came up with the 8 brocades?

[altiora]

Indeed it is the same sage-warrior.

 

These are part of the 18 postures:

[joeblast]

its like adding horse stance and yi jin jing flexing to 8 brocades in a way I like it