Sabriel - The Old Kingdom Series

The Old Kingdom is a place of free magic, necromancers and ancient spirits bound to elemental forces. Who will guard the living when the dead arise? Sabriel has spent most of her young life far away from the magical realm of the Old Kingdom, and the Dead that roam it. But then a creature from across the Wall arrives at her all-girls boarding school with a message from her father, the Abhorsen - the magical protector of the realm whose task it is to bind and send back to Death those that won't stay Dead. Since the demise of the Royal Family the Dead have become stronger and more fearless, and now it seems their forces are threatening to overwhelm the Old Kingdom.