In the Ambhan Empire — inspired by Mughal India — the Amrithi are a persecuted nomadic people descended from desert spirits, coveted for the magic in their blood. Mehr is the illegitimate daughter of an imperial governor and an exiled Amrithi mother; she has inherited both her mother's face and her forbidden magic. When the Emperor's most feared mystics discover her power, Mehr is forced into a dangerous servitude that could awaken sleeping gods — or destroy the empire itself.

Mehr is a richly realized protagonist — stubborn, morally principled, and quietly fierce, her strength expressed through subtlety and endurance rather than violence. Her sister Arwa in the sequel is equally compelling: a widow determined to prove her worth who finds herself walking a bloody path of shared history alongside a disgraced prince. Both women feel fully realized, shaped by a world that underestimates them.

Across two books, the duology follows both Mehr and her sister Arwa through the crumbling Ambhan Empire. The first book explores dream-magic and ritual dance; the second shifts to death-magic and a forbidden walk through the realm of ash, where mortals can seek echoes of their ancestors. Together the books form a complete story about identity, the cost of empire, and the quiet fierce strength of women who refuse to be erased. Named one of TIME's Top 100 Fantasy Books of All Time.