Fleeing from the ruins of New Undertown, Rook Barkwater and his colleagues - the librarian knights, Felix Lodd and his banderbear friends - must lead the escaping population to a new life in the Free Glades. But perils aplenty are ahead for the crowd - not to mention some goblins with plans of their own - This is a dramatic and exciting conclusion to the Rook Barkwater sequence that takes the reader on a thrilling journey across the Edgeworld.