Fledgling Water Master Mari Prothero rebels against her expected arranged marriage at age eighteen until she learns that her family's magical heritage is actually protected by these unions. This story combines East of the Sun and West of the Moon, as well as Tam Lin, with the Selkie of Sul Skerry. We'll see Nan and Sarah (from Wizard of London) as adults, coming into their own, and Grey and Neville, of course!