I should preface this with I read books only for enjoyment at home...

The "Mitch Rapp" series by Vince Flynn is a good visceral read

I like the John Sanford "Prey" series for crime thrillers

The Jean Aual "Children of the Earth" series will have you wanting to hunt Mammoth during the cold winter months

Also the Stephen Hunter "Bob Lee Swagger" books have some good twists if you like sniper books