Bestselling author Garth Nix's amazing Seventh Tower series is back - now with a great new look! The Underfolk are restless. For a long time, they have kept quiet, occupying the lower levels of the Castle. But now they are going to be heard . . . Tal and Milla are no longer alone in their quest for the truth about their world. They have been joined by Crow, a rebel Underfolk, and his band of conspirators. They know many secrets about the Castle - and are on the verge of uncovering the greatest secret of all. The darkness is growing deeper. The shadows are growing stronger. And Tal and Milla are in greater danger than ever before.