actually 3.5-4
I have read a number of books by this author and enjoy her. this one is a little bit more out of her normal genre. Some of the criticisms I have read -- a bit too long, don't connect to the characters due to the time spent on the history part - I would tend to agree with . However it is based on real characters which I found fascinating. And while I'm getting a little tired of reading WW II, this one took it from a bit of a different perspective and I found that I liked it. A good read.