Looking for western/history page-turners for an older guy

Looking for book recs for my dad. He’s an outdoorsy, horse-ranch, Bill O’Reilly history book type, but I’m trying to steer him toward books that are actually well-written and grounded in reality without triggering the “my liberal daughter is trying to reprogram me” alarm bells. Could be fiction or nonfiction. Looking for page turners rooted [...]