Mercenary Royal: Dead Suns (Obsidian Rim #6)

Is it a rescue or a princess-napping?

Nyssa Leofric can't marry the new head of Riel Industries. They trade in illegal weapons and he only wants her for her wealth and family name. When her parents insist, and unable to escape on her own, she arranges arranges her own kidnapping, hiring the mercenaries known as the Dead Suns.

Jessie Tabris believes in two things: getting the money up front and that people lie. He takes the job because Riel owes him credits. But when Nyssa's ransom is paid, he finds himself in a bind. No one should be forced into a life they don’t want. But the Dead Suns are threatening to disavow him and his team if he doesn’t return Nyssa to Riel.

Now they must work together or they could both wind up as part of Riel's next experiment.