Bill is 1000% correct that George wrote that book. In fact George wrote a series of five books like the one you saw on Ebay. I still have that complete set of five books. I bought that series of books more then 43 years ago when I attended the Mattson Academy of Karate - Boston at 3 Hancock St. That was one fantastic dojo. I still miss it to this day. In fact, I still have original copies of George's very first Yellow Book, the Red Book, The Gold Book, and of course the Hard cover Uechi Ryu Karate Do Black book. Oh, let’s not forget the original copies of George's book - The Way of Karate. I have that also.
PS - Sorry, none are for sale. They are Uechi Ryu treasures.