I just ordered a copy of Sun Yogi Unshakar's new book "The Essence of Sun Yoga." There is no free preview on Amazon but there are some tiny images of pages you can click on and expand to readable size. From what I've read just in the table of contents, it is the sungazing book that I've been waiting for, one that delves into the sacred solar science and spirituality behind sungazing. HRM knew about the spiritual effects of sungazing but didn't want to talk much about it because he was concerned that people would think it was a religion. Sun yogi Umshakar has no such reservations. A word of caution, however, if you get the book. Sunyogi Umshakar is also less cautious than HRM, who advised sungazers to not do it after 1 hour after sunrise or before 1 hour before sunset. Sun yogi Umshakar has little or no restrictions on time of day or length of sungazing sessions.
I will read it and give a review of it in a couple of weeks on my blog at
http://solrevolution.blogspot.com/ Wayne