David
Irving replies:

YOU will find a great deal of material on the Plot in my Hitler biography;
you can download it free and if you are really keen I could send you the draft pages from my forthcoming Himmler biography as Word files.

I expect you are rather overwhelmed with stuff. The real expert on the
Hitler Plot is Professor
Peter Hoffmann in Montreal
University
, and you would do well to wheedle a short quote from him.

He wrote the book, literally, on the anti Hitler conspiracy and on
Count Stauffenberg, the assassin. Mention my name, and I am sure he will write you.

[Heinz Guderian]In my mind the really interesting question is which other top Nazis were “in the know” and stood back, waiting to see which way the cookie crumbled:
Heinz Guderian (right: he however became Chief of General Staff a few days later and kept his mouth shut), Joseph Goebbels, Albert
Speer, Heinrich Himmler
himself — there are clues that each of these men knew the balloon was about to go up that afternoon, and panicked when it went wrong.