I am very impressed with your explanation and historical review of the Golden Ratio since the 15th Century, however I am disappointed that you did not go further back to India and the Far East where The golden ratio using the 9 Hindu numerals discovered by Fibonacci existed for centuries and thousands of years. There you would have found a wealth of information regarding the use of the Golden Ratio, particularly in the way the monuments, the places and castles were built. There before Columbus the people designed magic squares called yantras that used the measurement of the Golden Ratio. All this history is missing in your book , I hope that one day you will write book two on this topic. I found your books interesting...
Swami Ram Charran