Suite Francaise by Irene Nemirovsky
This novel is about the occupation of France in 1940. It tells the overlapping stories of several people/families as they evacuate Paris on the eve of the occupation. It's beautifully written.
Irene Nemirovsky was a Russian Jew living in France. She was already a successful author at the start of the war. In 1942, she was deported to Auschwitz where she was murdered. Her manuscript wasn't published for many decades. This book is an account of the occupation/war by someone who truly knew. So sad.