Music, magic, and a real-life miracle meld in this virtuosic, genre-defying tour de force from storytelling maestro Pam Muñoz Ryan. Lost and alone in the forbidden Black Forest, Otto meets three mysterious sisters and suddenly finds himself entwined in a puzzling quest involving a prophecy, a promise, and a harmonica. Decades later, Friedrich in Germany, Mike in Pennsylvania, and Ivy in California each become interwoven when the very same harmonica...