Since we are on the topic of Mr. Hubbard, I came across a site a while ago that sells his books and does performances of his work. They also have audio books. I didn't post anything because they had no eBooks, but I just saw a special offer they had with their newsletter offering a free eBook. So maybe they will start offering eBooks in the future.
http://www.goldenagestories.com/html/optinform.php