There is a book about Rick Rescorla, Heart of a Soldier by James Stewart. Stewart wrote it in collaboration with Daniel J Hill, Rescorla's best friend, and his wife Susan Rescorla; a good friend of mine in the USAF sent it to me last year.
It is one of the most intensely moving stories I have ever read, particularly when dealing with Rescorla's exemplary leadership and courage in the field and his selfless actions on 9/11. I can't recommend it highly enough.