From the #1 New York Times best-selling and critically acclaimed author of I Am Rebel comes a middle-grade fantasy adventure about siblings, courage, and the magic that hides in the cracks. Step into a world of fairy tricks and hidden danger . When an evil fairy steals Yanni's baby sister and swaps her for a changeling, Yanni is swept into a dangerous race against time to get her back. After all, fairies delight in tricks, and rescuing her won't be easy. With the help of his cousin, Amy, and the reluctant changeling, Yanni must travel to goblin palaces and battle-swept oceans, discovering ancient treasures and secrets along the way. Yanni will need every drop of courage and even a few tricks of his own if he's to outwit the fairy and save his sister .