It is 1913, and twelve-year-old Petra Luna's mama has died while the Revolution rages in Mexico. Before her papa is dragged away by soldiers, Petra vows to him that she will care for the family she has left—her abuelita, little sister Amelia, and baby brother Luisito—until they can be reunited. They flee north through the unforgiving desert as their town burns, searching for safe harbor in a world that offers none. Each night when Petra closes...