I have a strong suspicion that whoever is behind the forgeries, is also the "unnamed sources" for most of the garbage in Kitty K's book.
They are just about crude enough for that to be believable; what kind of forger uses a word processor in its default setting, and doesn't research the format of typical 1972 TANG memos?
And, of course, what kind of journalist who hopes to maintain a reputation "without fear or favor" goes to the wall on the basis of forgeries so obvious that you could cite a different, independent reason to call them frauds every day for the next month.