The Interrex - Catherine Fisher

Having tapped into the Crow, the Order's legendary powerhouse, Galen is charged with a force beyond anything he, or his apprentice, Raffi have ever known. And when, during the ritual ceremony on the night of Flainsdeath, Galen receives a message from the makers urging him to find the Interrex - the child of the last great Emperor - Galen knows that the Keepers are tantalisingly close to the brink of a revolution. Meanwhile, Gary is struggling to come to terms with her past, her identity and the mystery of how she became a member of the Watch.