The Nightingale by Kristin Hannah

The Nightingale by Kristin Hannah is a lovely novel about the characters Vianne Mauriac and her sister Isabelle in occupied France during World War II. 

It's so important have books like this that keep alive the stories of German atrocities during the war, and Hannah does a great job telling of the heroic actions of the sisters, with a great conclusion to the book about the lasting impact of both women.