The highly anticipated third book in Sabaa Tahir's New York Times bestselling Ember Quartet.

Beyond the Empire and within it, the threat of war looms ever larger.

The Blood Shrike, Helene Aquilla, is assailed on all sides. Emperor Marcus, haunted by his past, grows increasingly unstable, while the Commandant capitalizes on his madness to bolster her own power. As Helene searches for a way to hold back the approaching darkness, her sist ...