This book is set during Reacher's MP days, when he was a member of the elite MP group who could investigate anybody at all in the military. And that's just what he did in this one, starting with the mysterious death of a general from the armoured corps.
I enjoy the Reacher books, and this one was right up to par. I like the reasoning and the way the story unfolds, even though sometimes I want to yell 'Don't do it!' because it's going to lead to all sorts of complications. However, Reacher sorts it all out.