Genevieve's War — Patricia Reilly Giff

Thirteen-year-old American girl Genevieve has spent the summer of 1939 at her grandmother's farm in Alsace, France. Then she makes an impulsive choice: to stay in France. It proves to be a dangerous decision. World War II erupts. The Nazis conquer Alsace and deport the Jews and others. A frightening German officer commandeers a room in Meme's farmhouse. And when Gen's friend Remi commits an act of sabotage, Gen is forced to hide him in the attic―right above the Nazi officer's head. Genevieve's War is a gripping story that brings the war in occupied France vividly to life. It is a companion work to Lily's Crossing, a Newbery Honor Book.