Azul del Arroyo has the rare, forbidden power to wake the dead, all she needs are their bones. She used it once already to bring her sister Isadora back to life, and when Isadora dies again during their journey into the land of Lord Death, Azul is prepared to do whatever it takes to reverse it a second time.
Standing in her way is the Emissary of the Lord Death, sworn to stop a necromancer who, by rights, shouldn't exist, no matter how drawn to her he becomes. As Azul chases her sister's bones through a capital ruled by a child king, she's pulled into a deadly game involving a resentful count, a faceless witch who sells the bones of gods as dreams, and a long-lost half-brother with secrets of his own.
The first book in a duology, Mistress of Bones is built around a world where the gods once bound the continents together with their own bones, and where the debts of that ancient sacrifice are coming due again.