In this "poignant" (Publishers Weekly), riveting middle grade novel that's "a 'Hatchet and Gretel story'" (Booklist), two unlikely friends fly off on an adventure they hope will set them free--only to learn the value of what they left behind. Gerty has a secret: She's building an airplane. She wants to join the Civil Air Patrol, where pilots as young as twelve help with disaster relief--but she knows her...