Voidwalker

Fi has carved out a career as a cross-dimensional smuggler by sticking to simple rules: keep your routes secret, always draw your energy sword first, and - at all costs - avoid the daeyari, the carnivorous immortals who have ruled for millennia.
When she's hired to smuggle a bomb into the capital, instinct tells her the risk isn't worth the pay, but the entreaty of a long-lost friend guilts her into accepting. Until the heist goes terribly wrong, and Fi is thrown at the feet of the daeyari lord, Antal, as payment.
Antal is a hunter - cold and cunning and furious at Fi for her part in the attack on his city. Her saving grace is a common enemy: he'll spare her if she helps him uncover who masterminded the scheme. To save her life, her family, and the village she calls home, Fi must join Antal on a new hunt with far higher stakes than she's ever faced before, bartering with neighbouring immortals who might offer an alliance - or tear their throats out in the snow.
She's always known the dangers of her trade - and of the power she's wielded since childhood, allowing her to see the secret doors between realities, to walk the Void itself. But nothing could have prepared her for meeting Antal. For the deal she's been forced to make, and what that deal might ignite. A revolution. And a temptation - for how sweet the monster's fangs might feel.