Do Not Wake the Devil - Peters, Andrew, and Peters, Polly, and Cottrell Boyce, Frank (Series edited by)

Arthur and his best fiend Yaz live in a tiny Shropshire village beneath the rocks of the mist-shrouded Devil's Chair, where dark tales are more than mere superstition. Searching for Arthur's missing father, the two encounter more than they'd bargained for - strange beasts, a fallen angel, a broken spell...and an ancient menace stirring in the dark ...

Do Not Wake the Devil 2011, Heinemann, Harlow

ISBN-13: 9780435045999