The thrilling conclusion to the New York Times bestselling series!

Princess Theodosia was a prisoner in her own country for a decade and renamed the Ash Princess. But though she wore a crown of ashes, there is fire in Theo's blood. As the rightful heir to the Astrean crown, it runs in her veins.

Now free, with a misfit army of rebels to back her, Theo must liberate her enslaved people and face a terrifying new enemy: the new Kaiserin. The Kaiserin's strange power is growing stronger, and there is more at stake than ever. Theo must learn to embrace her own power if she has any hope of standing against the girl she once called her heart's sister.