World of Lugers Proof Marks

I think it would most helpful to many of us if you tell us what is fake in the book. What is the "SD" luger? Is the Book mostly fiction? Who were the guys who made up stuff for the book? Are they some of the people that are currently considered experts[at least in some quarters]? Do you believe Kenyon was a willing party to publishing known fake information? If all this is true--where can we turn for accurate and factual info on markings and proof marks?