Wow. You really take this seriously, don’t you?
If you want to get as cynical as I am, two books would probably do the trick:
https://www.amazon.com/Project-Beta-Bennewitz-National-Security-ebook/dp/B000FCK0KI
The first book describes a true scandal—how the US military used disinformation on UFOs to drive a private citizen insane.
https://www.amazon.com/Managing-Magic-Governments-Disclosure-Plan/dp/1542857694
The second book argues that there is an actual “disclosure plan”, but when you read all the details you realize that for decades private UFO researchers have been sent on endless wild goose (or ET) chases by various government functionaries.