Edge Chronicles 9: Freeglader. Third Book of Rook, Paperback

Fleeing from the ruins of New Undertown, young librarian knight Rook Barkwater and his colleagues - 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, and Rook knows the journey will be full of danger.