There is never a dull moment for Celie and her family in Castle Glower--even when they're not in the Castle itself! After traveling to the seaside kingdom of Lilah's betrothed prince, Lulath, Celie and her companions are busy training griffins, enjoying wedding festivities, and finishing construction of a grand ship built from parts of the Castle.

But on their maiden voyage, the Ship steers them far off course into uncharted waters. Celie and Lilah hope that the Ship is taking them to the ancient island where unicorns once roamed, but as the journey grows longer and supplies run low, they are in trouble. Celie, Lilah, and Rolf know they must trust the Ship as they trust the Castle, but what if they never reach land again?

Don't miss these other stories from New York Times bestselling author Jessica Day George:

The Rose Legacy series
The Rose Legacy

Tuesdays at the Castle series
Tuesdays at the Castle
Wednesdays in the Tower
Thursdays with the Crown
Fridays with the Wizards
Saturdays at Sea

Dragon Slippers series
Dragon Slippers
Dragon Flight
Dragon Spear

The Twelve Dancing Princesses series
Princess of the Midnight Ball
Princess of Glass
Princess of the Silver Woods

Sun and Moon, Ice and Snow

Silver in the Blood