From the New York Times bestselling author of Ninth House, Hell Bent, and creator of the Grishaverse series comes a highly anticipated historical fantasy set during the Spanish Golden Age.

In a shabby house, on a shabby street, in the new capital of Madrid, Luzia Cotado uses scraps of magic to get through her days of endless toil as a scullion. But when her scheming mistress discovers the lump of a servant cowering in the kitchen is actually hiding a talent for little miracles, she demands Luzia use those gifts to better the family's social position.

What begins as simple amusement for the bored nobility takes a perilous turn when Luzia garners the notice of Antonio Pérez, the disgraced secretary to Spain's king. Still reeling from the defeat of his armada, the king is desperate for any advantage in the war against England's heretic queen—and Pérez will stop at nothing to regain the king's favor.

Determined to seize this one chance to better her fortunes, Luzia plunges into a world of seers and alchemists, holy men and hucksters, where the line between magic, science, and fraud is never certain. But as her notoriety grows, so does the danger that her Jewish blood will doom her to the Inquisition's wrath. She will have to use every bit of her wit and will to survive—even if that means enlisting the help of Guillén Santangel, an embittered immortal familiar whose own secrets could prove deadly for them both.

An imprisoned prince. A vengeful queen. And a battle that will determine the future of Elfhame.

Prince Oak is paying for his betrayal. Imprisoned in the icy north and bound to the will of a monstrous new queen, he must rely on charm and calculation to survive. With High King Cardan and High Queen Jude ready to use any means necessary to retrieve their stolen heir, should Oak attempt to regain the trust of the girl he's always loved, or remain loyal to Elfhame and hand over the means to end her reign—even if it means ending Wren, too...

With war looming and treachery lurking in every corner, neither Oak's guile nor his wit will be enough to keep everyone he loves alive. He will have some terrible choices to make.

From the #1 New York Times bestselling author Holly Black comes the stunning blood-soaked conclusion to the The Stolen Heir Duology.