The concept of this book is great. Women spies, reading from different points of view and timelines, and the charm of the era are all good qualities of this book. However, the concept wasn't quite carried out the way it seemed it would. The story was interesting, but it wasn't exciting and didn't keep me hooked or interested for very long. I was left with a lot of "why?" questions and didn't really enjoy the main characters. This is not to say that no one would enjoy this book, simply that it was not at all my style or pace after the first couple of chapters. It is definitely a historical fiction book, but I wouldn't give it any type of suspenseful or thriller tag. I was really excited about this book, so maybe I had too high of expectations, but it just didn't meet what I hoped for.