Untamed City Carnival of Secrets & Carnival of Lies by Melissa Marr Book

This book was formerly published as “Carnival of Souls.” It also has a novella prequel in the back called Carnival of Lies.
Untamed City: Carnival of Secrets is set in two worlds: our own, and the city of daimons, ruled by a rigid class structure. In the human world, 17-year-old Mallory only knows about the City from her father, who told her the story of how he and every other witch fled from for their lives from the daimons. Meanwhile, Aya and Kaleb are fighting for their lives in the heart of the City at the Carnival, and Mallory has no idea that forces are leading her there as well.