David and the dragons are back in the sixth installment in the New York Times bestselling Last Dragon Chronicles! After destroying a trace of dark fire, David, Zanna, and the Pennykettle dragons vanished. In a brand-new world, Co:per:nica, which runs parallel to that of Crescent Lane, firebirds roam the ancient librarium, a museum for books. But when 12-year-old David and Rosanna accidentally injure one of the firebirds, they are suddenly thrust into a remarkable adventure.