The fifteenth magical installment of New York Times and USA Today bestselling series of fractured fairy tales for fearless kids! This time, the magic mirror (with a little help from the magical fairy, Maryrose) sends Abby and Jonah into the story of The Twelve Dancing Princesses. And they have a task: find the enchanted ruby and bring it back to help Maryrose. But to do so, Abby and Jonah must follow the twelve sisters from their palace to the secret spot where they go dancing. Abby and Jonah will have to learn some moves of their own -- and dancing isn't easy when you don't know the steps! How will the two of them wriggle their way out of this magical mess?