I'm partial to two of Dr. Yang Jwing-Ming's volumes:
1. Qigong for Health and Martial Arts (contains Eight Pieces of Brocade. I own the video of this exercise. It's good. The teaching is accessible to a student who has had experience.)
2. Muscle/Tendon Changing and Marrow/Brain Washing Chi Kung

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"....if the mind stops with the sword with which a man is going to strike you, there will be an interval, and your own action will be lost." (Takuan Soho)
"I'm so proud, I've got tears flying out off my butt" (chief108)