Yes I have a close associate at the NSA. His name is Svetoslav Andonov.
That is how I obtained my copy of Training and Adaptation in Sport. Incidentally, Tsvetan Zhelyazkov is the co-author.
The issue is that Svetoslav took it upon himself to make me a copy, as a gift, and send it to me. This was a few years ago.
Please understand that I’m not comfortable providing his contact information in this regard.