The Burning Swift (Shadow Skye, Book Three‪)‬

When news reaches Skye of a deadly army approaching from the south, set on the destruction of every living Scotian, the clans rally to defend themselves. But against such a huge force, victory seems impossible. As Jaime risks his life with an ancient and forbidden blood magic, Sigrid returns to the wilds of Ingland in the hope of an alliance. Meanwhile, Agatha is forced on a journey to the very heart of the enemy, where death and betrayal waits in every shadow. With the fate of Skye in their hands, it will take all their courage, cunning and sacrifice to not only survive the final battle, but to save the future of Scotia... The breathtaking finale to the critically acclaimed Shadow Skye series, for fans of Philip Pullman and Garth Nix.