Dreams of Gods and Monsters by Laini Taylor

In the third and final book of the Daughter of Smoke & Bone trilogy, Karou has gained control over the chimaera rebellion through clever and dangerous deception, and she wants to stop the life of bloodshed and loss. Now with a common enemy, Akiva and Karou come back together in a twisted version of their shattered dream that blew to ashes and pull their allies together. But just when it starts to feel hopeful, like a new way of living for them and their people can be true, bigger threats than Jael and his seraph army unravel.