I enjoyed the previous novel in this series much better than this one. Billed as a mystery, there really is no mystery in this novel. It is pretty much action all the way.
Caine is something of an imitation of Jack Reacher (from author Lee Child's books).. ex military, all around tough guy with a soft heart for damsels in distress. He is clever, witty, and at times brutal.
Knief is a good enough writer. He does a good job of describing the setting, the action, etc. However, one expects a mystery novel to actually contain a mystery. There was no puzzle, no red herrings, nothing to cause the reader to scratch his head and think how clever the author was in his plotting.