Sold to the Alien Pirate by Maia Tanith

Delia knows how to follow the rules. Azr knows how to break them. And he might just have met his match.
A stable job. A predictable life. No broken rules, no taking risks. She’s never so much as driven over the speed limit. Boring, but safe.
This is Delia’s life. That is, it was her life.
Until she wakes up on a spaceship in God knows where, suddenly the property of an intergalactic slave smuggling ring. And they don’t have anything safe in store for her.
She’s going to the Xillian Games. To fight or die.~
Pirate Azr was betrayed by the woman he loved. He lost his valuable cargo, his future, and his freedom.
And he’s going to lose his life too – unless he can fight his way out of the Xillian Games in one piece. Along with keeping his naïve cellmate alive too, of course.
But keeping a weak Earthling alive in a cut-throat world when she is intent on doing everything by the book is harder than expected. And keeping his emotions in check is harder still.
For Azr may have a questionable moral compass and a penchant for treasure – but the greatest treasure he’s ever found might just be the most surprising.