I really enjoyed this one. I really like military memoirs, but many of them either over-romanticize, or they tend to preach. My least favorite of these was Lone Survivor by Marcus Lutrell. Chris Kyle's American Sniper was similarly plagued. In The Operator, Robert O'Neill actually sounds like a real person. He did not preach and he did not romanticize. This is probably tied for my favorite military memoir with Inside Delta Force by Eric Haney.