Her Cold Heart by Michelle Howard

All Farid Ogoni wants is his freedom from the illegal fight ring he’s been bound to.
Fight. Win. Fight. That’s his focus and his goal. Nothing will derail him and losing isn’t an option.
Then she comes along.
Sora’s used to being cold and calculated to get a mission completed. She has one job—rescue the cyborgs forced into the fight ring. Nothing stands in the way of her duty and responsibilities.
Until him.
Passion ignites when two rebellious spirits find one another in the midst of an explosive mission. Can they survive the aftermath or will they burn in the flames of betrayal?