Rodney, start with
Boyd: The Fighter Pilot Who Changed the Art of War
If you want it direct from Boyd, here is one of the few recordings of his famous Pentagon briefings, Conceptual Spiral. You will need the slide pack to follow along as he references it:
Conceptual Spiral John R. Boyd
Further study would be his
1964 Aerial Attack Study
Finally leading to his only other written work:
Destruction & Creation
(Youtube playlist Conceptual Spiral if URL if the youtube insert doesn't work in your browser:
https://www.youtube.com/playlist?lis...569CDF59FE54A3 )