Prologue:

Aro was terrified. "Edward, you don't realize what you've done. There's no telling what she'll do once released into the human world. There's reason we wanted her so badly, after all."

I now realized how truly dangerous she was. I hadn't been able to grasp that, not in the months of her unafraid captivity, not even just now. I wondered, though, that she didn't like any of the places of her captivity but didn't just bust out. Everyone knows she could, if she wanted. What was it that she wouldn't do that? Maybe Bella could find the answer, but not me.