Great book. So extensive, that it gives details about what kind of siddhis develop by holding kumbaka for so and so lengths of time. Never seen this kind of information in any other book I have read. Highly recommended.

This is a book for serious practictioner of YOGA, and by far the most exhaustive and containing those intricate keys and details which cannot be seen anywhere. A true master can give these insights. I have been practising yoga from my teens by the grace of my grandfather, but what I got from this work is simply unbelievable.

Not a common man's book. But if you want information about a true spiritual journey, this book is excellent

Book is very good and fullnof knowledge but before this you need to do every basics this is advance