'Advanced Yoga Practices' by Yogani.
Or 'Deep meditation', a little book,
as this is the core practice of the '"AYP" system.What is the AYP system? ---well go to the web address provided below..If youare curious about applying self-development methods on on all levels beyond the asanas that are taught in class, and would like to learn more about the deeper, more spiritual, aspects of yoga.Some appliedphilosphy can help here too.It covers all the limbs of yoga and integrates them pretty well, as a system.I've only been doing it for a short while. It looks like success on one limb may carry over into another. yeah it know it sounds in theory pretty obvious. In practice though it's not the easiest thing to do.
Use alongside their website/forum located at www.aypsite.org
Deep Meditation is their core practice. You can find information on this, and more at the web address supplied.
if asana is not working ffor you ,then you could always try this. The DM practice, as the coommunity on that site call it, is like a turbo-charged version of meditation, so one must apply some of the safetty princiiples within the system so one can proceed safely and smoothly, without hitch or discomfrot, like anything in yoga.
I hope this helps anyone else out there who may be feeling a bit stuck in their 'yoga' practice..