The story of three women throughout the 1930s and later. One is American, one Polish and one German. Mostly based on actual characters, this books is another good read of the tragedies of WW2, in this cased based around the women concentration camp of Ravensbrück.
I've learned a lot, because I wasn't aware of the Ravensbrück camp before and the unique stories that took place there.
I only subtract one star because the motivation of the German doctor during WW2 wasn't told as convincingly as the other characters' motivations, in my mind. I understand this is the most challenging to get across, but it would also have been the most interesting one, I think.