I happen to me a member of the Weston A Price foundation, have been a member for many years.
Yes, I can see the picture of the book.
I cannot answer those questions because there is no way to know how many books are out there, it is possible that many members of the Weston A Price Foundation have this book, but I would not know this. No one would.
The book is gifted to the person's name that is on the book, I do not know who that person is. I assume the way it reads it may have been someone who helped him with the book.
The book was released : Paul B. Hoeber, Inc Medical Book Department of Harper & Brothers
New York London Copyright, 1939, by Paul B. Hoeber, Inc.
That is the only first release date listed for this book. The Book on today's market is valued at around 750.00-850.00.
You might contact the Weston A Price Foundation they might be interested in this copy you have.