The Heart Is Not a Size by Beth Kephart

Georgia knows what it means to keep secrets. She knows how to ignore things. She knows that some things are better left unsaid. . . . Or are they?

When Georgia and her best friend, Riley, travel along with nine other suburban Pennsylvania kids to Anapra, a squatters' village in the heat-flattened border city of Juarez, Mexico, secrets seem to percolate and threaten both a friendship and a life. Certainties unravel. Reality changes. And Georgia is left to figure out who she is outside the world she's always known.

Beth Kephart paints a world filled with emotion, longing, and the hot Mexican sun.