Into Battle (the Seventh Tower)

Fifth book of the thrilling fantasy adventure series, THE SEVENTH TOWER, from international bestselling author, Garth Nix. The Dark World is in danger for the Veil is vulnerable and war is coming. On one side are Tal and the Underfolk rebels. On another, Milla and the Icecarls are preparing an assault on the Castle. But on a third side is the most sinister force of all. A force of evil that has only now chosen to reveal itself, and so powerful that it could unleash the ultimate destruction!