I'm a great fan of the Jack Reacher character and series and was left in two minds as to whether this does justice to them. On the one hand, from a character development point of view, I think that THE AFFAIR is excellent and is a natural extension showing us a younger slightly less experienced and more fallible Reacher. The writing is fantastic and as usual I was hooked from the first page to the last as we follow Reacher assigned to a case by the Military Police. The description is spot on and the pace frantic, even though there is are less violent parts than some of the earlier books in the series. He is teamed up with a beautiful local Sheriff and the inevitable happens as they carry out the investigation which proves to have wide-reaching implications.
On the other hand, there are some serious flaws to the storyline itself. One is Reacher's reason for leaving the Army and the other is the rather dubious conclusion to the book. The Sheriff is just too gorgeous and the gratuitous sex scenes are over-done and unnecessary. I would have preferred to see a deeper reason for Jack leaving the Army, disagreeing with Black Ops or cruelty to prisoners of war, that sort of thing.
If the storyline was as developed as the character then this would definitely be a great thriller. As it is THE AFFAIR is good, but for me far from the best in what remains a gripping series.