He will be the destruction of the crown and the ruination of the throne. Power is much easier to acquire than it is to hold onto. Jude learned this lesson when she released her control over the wicked king, Cardan, in exchange for immeasurable power. Now as the exiled mortal Queen of Faerie, Jude is powerless and left reeling from Cardan's betrayal. She bides her time determined to reclaim everything he took from her.

Opportunity arrives in the form of her twin sister, Taryn, whose life is in peril. Jude must risk venturing back into the treacherous Faerie Court, and confront her lingering feelings for Cardan, if she wishes to save her sister. But Elfhame is not as she left it. War is brewing. As Jude slips deep within enemy lines she becomes ensnared in the conflict's bloody politics. And, when a dormant yet powerful curse is unleashed, panic spreads throughout the land, forcing her to choose between her ambition and her humanity.

From the #1 New York Times bestselling author Holly Black, comes the highly anticipated and jaw-dropping finale to The Folk of the Air trilogy.

You must be strong enough to strike and strike and strike again without tiring.

The first lesson is to make yourself that strong.

Jude has bound the wicked king, Cardan, to her, and made herself the power behind the throne. Navigating the constantly shifting political alliances of Faerie would be difficult enough if Cardan were biddable. But he does everything in his power to humiliate and undermine her, even as his fascination with her remains undiminished.

When it becomes all too clear that someone close to Jude means to betray her, threatening her own life and the lives of everyone she loves, Jude must uncover the traitor and fight her own complicated feelings for Cardan to maintain control as a mortal in a Faerie world.