Savage by Tana Stone

Waking up with a gorgeous alien barbarian and discovering he’d kidnapped her was bad enough. But she’s also trapped in the middle of a desert where no one can find her.
The cherry on top? No matter how much Caro protests, he’s convinced she’s his fated mate. And he won’t let her go until he’s claimed her.
Caro thought the Dothveks who helped them when they crash-landed on the planet were big and brawny and intimidating. But the barbarian who kidnaps her is even scarier. He’s a disgraced Dothvek who’s been exiled from the clan for murder, and he’s been living by himself in the desert. Apparently, he thinks she’s his to take. Not if she has anything to say about it.
Rukken has been by himself on the sands for years when he hears of the human females living with his former clan. The moment he sees Caro, he knows she’s meant to be his mate. Too bad she isn’t convinced. He’ll just have to keep her hidden until she realizes she belongs to him. Even if it means tying her up. If only he could restrain his own desires as easily as he can restrain the small female.