Demon Siege (Pacts Arcane and Otherwise, #4)

The demons have arrived, and the final battle for Kaighal is about to start.

In preparation for the siege, Kamira has gathered as many allies as she could, but some are more reluctant than others. In the city about to face off against powerful demons and their hordes of demonlings, its defenders are still divided. As it becomes apparent that there’s one or more traitors in their midst, Kamira and her friends will have to take risks to ensure Kaighal doesn’t fall.
While humans struggle with their own challenges, five demons vie for supremacy over one another. If Kamira has her say, that's five demons too many, and they all have to go, one way or another… even if she and Veelk have to face them on their own.

Humans, demons, and magic will clash changing the future of Kamira and Veelk’s home. But to truly save it might require more sacrifice than they expect.