Not sure if this should be posted under "Other Systems" - please advise if so. But, I thought it was pertinent to our Tantra forum. It is about how asana and pranayama help integrate sexuality in our spiritual life. It's not an AYP practice per se (there are minor differences), but is harmonious with AYP, especially in so far as HOY and AYP are two of the only systems I am aware of, which advocate a very healthy approach to sex and relationships in their proper spiritual context. The book may be a little introductory for advanced yogis, as Mark has tried to make it accessible to non-yogis as well, but I think you will find it enjoyable: http://www.amazon.com/gp/product/14...E6R6JKN262ZG