Here are sources for paper and electronic versions of the books. Click on the underlined words to go to that site.
The Science of Being Lightbearers World Center at scienceofbeing.com currently has the original The Fundamental Principles of Science of Being and Is there a GOD?, plus an electronic version of Science of Being and Science of Being 27 Lessons. They have printed a 2nd edition of Science of Being and recently published a new book, "The Teacher", The Public Years of the Baron Eugene Fersen - Volume I.
The original Science of Being and Is there a GOD? books can occasionally be found on eBay.