The fourth book in the New York Times bestselling series by Jessica Day George, where a dangerous wizard threatens to destroy Castle Glower for good . . .
Fridays at Castle Glower are about to get interesting! With newborn griffins hatching left and right, new Castle passageways to explore, and an out-of-the-blue wedding to plan, life is as exciting as ever for Celie, Lilah, and Rolf. But when the dangerous, ancient wizard Arkwright...