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.

The ancient world of magic is no more. Its heroes are dead, its halls are ruins, and its great battles between Light and Dark are forgotten. Only the Stewards remember, and they keep their centuries-long vigil, sworn to protect humanity if the Dark King ever returns. Sixteen-year-old dock boy Will is on the run, pursued by the men who killed his mother. When an old servant tells him of his destiny to fight beside the Stewards, Will is ushered into a world of magic, where he must train to play a vital role in the oncoming battle against the Dark. As London is threatened by the Dark King’s return, the reborn heroes and villains of a long-forgotten war begin to draw battle lines. But as the young descendants of Light and Dark step into their destined roles, old allegiances, old enmities and old flames are awakened. Will must stand with the last heroes of the Light to prevent the fate that destroyed their world from returning to destroy his own.