"The voices of Felix, Mildmay, and Kay ring out from the pages of this wonderfully paced and beautifully written final book in the Mélusine quartet." — Romantic Times

When Felix Harrowgate and Mildmay Foxe are charged with heresy and exiled from Mélusine, it feels like the end of the road. But upon entering the country of Corambis to face judgment for their crimes, the brothers find an insurrection underway to restore the monarchy. In a last ditch attempt to turn the tide, the losing rebels have set an ancient machine in motion on a course of destruction. Only a powerful wizard can put a halt to the engine's mysterious and terrifying force. Felix and Mildmay stand ready to take on the challenge—and meet their new destiny.

The spellbinding conclusion to award-winning author Katherine Addison's captivating series, The Doctrine of Labyrinths.

"Intelligent and well written." — Sacramento Book Review

"Terror-inducing plot points and more intimate dilemmas . . . should satisfy even the rare cynical reader who hasn't already been won over by [the author's] gifts for character, voice, and great prose. — Locus

Originally published under the name Sarah Monette.