Steven Hunter Hot Springs, Dirty White Boys, Time to Hunt, Shooter, Day Before Midnight -any and all are superbly entertaining.
Should you decide on Stephen Hunter, be sure to read them in a particular order.
I suggest starting with Point of Impact, then A Time to Hunt. As an aside, the movie "Shooter" with Donnie Wahlberg, Danny Glover & Ned Beatty is a take-off of Point of Impact, but the book by Hunter is light years better than the flick.
Next, Dirty White Boys, then Black Light.
https://www.bookseriesinorder.com/bob-lee-swagger/ya!
GWB