Sisterland — Linda Newbery

When Hilly's grandmother becomes ill with Alzheimer's disease, her family is turned upside down by revelations from her life during World War II.

Hilly's German grandmother, HeidiGran, comes to live with her family after she gets Alzheimer's disease. As her mind becomes more muddled, secrets buried in her past start to emerge. Why does HeidiGran keep talking about a girl named Rachel? And why does she make racist remarks about Hilly's friend, Ruben? As Hilly struggles to cope with revelations about her family's past, she encounters racism and prejudice for herself when a friend becomes the victim of a mindless attack.

This evocative and deftly told novel explores prejudice and its effects on multiple generations in one family.