Willow Run by Patricia Reilly Giff

As World War II rages in Europe, it is up to those left behind to do all they can to support the war effort. For 11-year-old Meggie Dillon, that means moving away from her home in Rockaway. Her father has gotten a job in Willow Creek, Michigan working in a factory that makes bombers. Not only does Meggie have to leave her home and friends, but her beloved Grandfather is not going to move with them. Life in Willow Run consists of living in a nondescript apartment with paper thing walls. But Meggie does meet several children and shares adventures and the uncertainty of life during the war.