Voidwalker

Fionamara, called Fi, has already died once. The experience left her able to see into the Void, the space between dimensions that the daeyari use to cross over. The daeyari are immortals who feed on human flesh, and they keep an uneasy truce with humanity.

Fi earns her living by smuggling stolen magic from one world to another. A job for a former lover pulls her into a bombing and a coup inside the daeyari capital, and she is betrayed before she understands what she has been used for.

She is handed over to Antal, the daeyari overlord whose people she unwittingly helped attack. Rather than accept her fate, Fi strikes a bargain with him. She will find out who really set the bombing in motion, and in return she will help him take back his city.

What begins as a tactic for staying alive grows into something more dangerous between the two of them. This is a dark romantasy with high stakes, built around a reluctant alliance with a predator. It is the first book in the Beasts of the Void series.