Petra Luna is in America, having escaped the Mexican Revolution and the terror of the Federales. Now that they are safe, Petra and her family can begin again, in this country that promises so much. Still, twelve-year-old Petra knows that her abuelita, little sister, and baby brother depend on her to survive. She leads her family from a smallpox-stricken refugee camp on the Texas border to the buzzing city of San Antonio, where they work hard to build...