Pam Muñoz Ryan, author of Esperanza Rising, writes another hit novel with Echo. The book tells four stories weaved together by a magical harmonica.
The book begins and ends with three fairy-tale princesses and a lost boy named Otto. Otto wanders into the woods during a game of hide-and-seek. There he meets three princesses. He is surprised because they are in the book he has been reading. Otto begins to read the book to the princesses. He soon discovers the end of his book he is reading is blank. The princesses tell Otto he must write the ending. They also give him a magical harmonica with instructions to pass it along when the time is right.