The Providence of Fire is the second book in the Chronicle of the Unhewn Throne series by Brian Staveley. I started this one immediately after finishing The Emperor’s Blades.
The children of the late Emperor of Annur all go their separate ways towards figuring out who is behind the coup and the murder of their father. Kaden, the heir to the throne, seeks to ally with the Ishien; an elusive sect of monks devoted to defeating the Csestriim. Valyn and his Wing are making their way through the steppe towards Annur, but the Urghul are in their way. And Adare, eldest child and daughter, who now knows who murdered her father, does everything in her power to stay out of his hands and secure her own army. None of them knows whom to trust, and who the true enemy is.