KW's new book, Integral Spirituality, hits the #1 spot at Watkins Bookstore in London.
(see I-I Blogs section of the MultiPlex)
Here's a link to Shambhala:
http://www.shambhala.com/html/catalog/items/isbn/1-59030-346-6.cfm
The yoga of light and sound is really only one event. It's the frequency of their vibrations that is different.