Sent to a boarding school in Ancelstierre as a young child, Sabriel has had little experience with the random power of Free Magic or the Dead who refuse to stay dead in the Old Kingdom. But during her final semester, her father, the Abhorsen, goes missing, and Sabriel knows she must enter the Old Kingdom to find him. This is one of my favorite books of all time and a fantastic high fantasy novel. The world-building is immersive and the action is truly gripping.