What is the author's style in Echo Burning by Lee Child?

Echo Burning by Lee Child is written from a first person perspective throughout most of the book, switching occasionally into narrative. Jack Reacher, the main character, is one that Lee Child has written several books around, maintaining the same general theme. Echo Burning goes from Reacher's point of view to the perspective of the assassins who are involved in the plot to ensure the election of a local Pecos Sheriff. Reacher is an ex military policeman who is now free of the army lifestyle for the first time. Having grown up in an army family, and then enlisted, his entire life has been an ongoing relocation project. Lee Child has a good grasp of the kinds of physical and psychological effects that can be a part of a service vet's makeup, and builds his stories around them. Reacher sees the world through the eyes of a policeman, but also as a vet who has seen a large sampling of man's inhumanity to man. The assassins are there merely to do a job and get out, and become more and more nervous as their assignment becomes more convoluted. After eliminating three men, they are given the task of kidnapping a child and then babysitting her until her mother can be convinced to confess to a crime she didn't commit. Then they are given yet another assignment, and accept it even though the risks now outweigh the benefits. The story has small sections that are told through the eyes of the kidnapped young girl, but all of these perspectives are first person.