2016 Newbery honor book new York Times bestseller an impassioned, uplifting and virtuosic tour de force from a treasured storyteller lost and alone in a forbidden 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, in turn, become interwoven when the very same harmonica lands in their lives. All the children face daunting challenges: rescuing a father, protecting a brother, holding a family together. And ultimately, pulled by the Invisible thread of destiny, their suspenseful solo stories converge in an orchestral we crescendo richly imagined and masterfully crafted, echo pushes the boundaries of genre, form and storytelling innovation to create a wholly original novel that will resound in your heart long after the last note has been struck.