The War That Saved My Life by Kimberly Brubaker Bradley. It's historical fiction set in World War II about a girl named Ada who lives in London. Her mother is too humiliated by Ada's deformed foot to let her outside, and keeps her locked in an apartment. But when her little brother Jamie is shipped out of the city to escape the war, she sneaks out to join him and ends up at a house in the country with a woman named Susan Smith. At Susan's house, Ada teaches herself to ride a horse, learns to read, makes new friends, and learns about the world she never got to experience from her mother's apartment in London. But as the war drags on and more and more kids are shipped back to London, Ada starts worrying about whether or not her mother will come back for her, and if her bond with Jamie will be strong enough to withstand it if she does. This is a really awesome book. I've read it twice, and I'm currently reading it a third time!