Her Cruel Empire by Persephone Black

Thirty days. One million dollars. A deal with the devil.
I think I’ve made a terrible mistake…
The auction was supposed to be simple—thirty days of my life for enough money to save my family. What I got instead?
Eva Novak.
An arms dealer. A coldhearted criminal. The most dangerously beautiful woman I’ve ever seen.
She steals me away to a castle that belongs to nightmares, where the villagers in the town below cross themselves when she passes by and whisper warnings about women she’s made disappear.
Eva’s touch makes me forget I should fear her, but she doesn’t just want my body. She wants my secrets, my smiles, my stubborn hope that refuses to break even in the darkest places.
And the worst part? I think I’m starting to want her, too.
I came here to save the people I love.
Now I’m not even sure I can save myself.