Echo follows the journey of an enchanted harmonica, set on freeing three princesses from an evil enchantment. 
 This book took me forever to finish, because it was so fragmented. Even having read the ending, I can't say that I enjoyed the way each narration stopped so abruptly, only to be picked up again at the very end. 
 By the time the book got to the end I was so aggravated, I didn't care about the sisters, or Otto, or any of the other stories, because they'd all melded together in my mind.