Something is awakening underneath Southmarch Castle, something powerful and terrible that the world has not seen for thousands of years. Can its young defenders Barrick and Briony, along with a tiny handful of allies, ordinary and extraordinary, find a way to save their world and prevent the rise of a terrible new age--an age of unending darkness?

With King Olin imprisoned and Prince Kendrick slain, the royal twins Barrick and Briony have been forced to flee their homeland. But both families and nations can hide dark and terrible secrets, and even if Barrick and Briony survive learning the astonishing truths at the heart of their own family and of Southmarch itself, they must still find a way to reclaim their kingdom and rescue their home--from traitors, tyrants, a god-king, and even the angry...