never read that one, but I do recall hearing about dr morris. I havent ever investigated his methods but some guys I know swear by 'em. I'm still not entirely sure how kundalini energy fits into the various paradigms, some utilize it, some dont. I was taught a particularly potent k exercise but...that one's sitting in the bottom of my toolbox for some later time.
even if you're only getting in a small amount of time, its efficiency can be greatly enhanced with the right certain few techniques, that's why I mention fixing the spirit at the seat of awareness often - that's one technique I didnt know about well enough back when I first made good strides with dr yang's foundational material.