Jack ReacherRead about another series on the list.
Reacher is a former military cop. He was good at his job, really good. What makes him so successful (besides his imposing physique) is that he has a clear understanding of good and bad. Reacher is not a man to see the shades of grey. He is also a man of action. If Reacher sees something wrong, or comes across someone in trouble, he doesn't hesitate. He does something about it. His rough-and-ready attitude really appeals to readers weary of protagonists inclined to agonize and over-think. Every "Reacher" book is full of action and fight scenes and author Lee Child never allows for a dull moment.
--Marshal Zeringue