"An extraordinary journey of mind, body, and spirit--both for Merlin and for ourselves."--Madeleine L'EngleThe tenth installment in T.A. Barron's magical fantasy saga MERLIN!As peace returns to Avalon, Tamwyn, Elli, and Scree discover a terrifying new threat: The Warlord Rhita Gawr has set out to conquer Avalaon as well as mortal Earth. Racing against time, the friends embark on three separate quests. To succeed, they must solve Avalon's most elusive mysteries. And they will need to travel vast distances—both in their world and in their own hearts.