Killing Floor - Lee Child
Well I first had a problem with the character because he is/was a Officer in the MP corps who investigated murders and collected a lot of skills that he drew on in this book.
Mot much research done on the authors part. Officers in the MP corps are not investigators. That falls into MPI and CID which are NCO's and Warrant Officers. Along with a set of skills no army MP would pick up in their time in. A civilian cop perhaps but not an MP.
Now don't get me wrong the book is a good read, but the main character is a bit "too good".
Then again maybe I am being a bit harsh considering I actually know what an MP's background should be.