The "Mitch Rapp" book series by author Vince Flynn should be read in order. The series chronologically follows the main character through a series of thriller novels.
The first book in the "Mitch Rapp" series is titled "American Assassin," and the last title in the book series that Vince Flynn wrote is "The Last Man." Kyle Mills wrote the 15th book in the series after Vince Flynn died in 2013 after a long illness. Mills plans to release at least two more titles in the series, as of 2015.
Vince Flynn specialized in political thriller novels and published 14 books during his career.