Written for readers who have finished Book 1.
The front-door key to number twelve is the little iron heart of Edie's whole story. Her father pressed it into her hand the summer before she was evacuated, and with it a promise he couldn't quite say aloud: you belong here, this is yours, you'll come home. Across the years and miles of war she carries it everywhere — the weight of home in her pocket, and the measure of everything she is waiting to get back to.