I am reading the book Thresholds of the Mind that came with my Holosync course, it has been written by Bill Harris who is the CEO of Centerpointe Research. I am about half way through the book, it is very informative and has lots of information on how meditation affects the brain and especially using the holosync technology, there are drawings and diagrams on brave wave patterns etc.. It also has information on how Centerpoint was set up. Great read so far, I will give you the complete run-down on it when I finish it.