At the risk of damning this book with faint praise, this is a good book I have a few problems with. Characters were under-developed, especially the main antagonist. She was really a vile human being without any redeeming features. I think there could have been some capacity to explore her and discover why she was the way she was. I also found the lack of empathy the protagonists had towards the antagonists a little over the top...almost Jack Reacher-esque (author Lee Child). Setting that aside as a bit of fluff that killed an afternoon, I enjoyed this book a lot. It won't win any awards but it's an entertaining diversion.