Mission: Planet Biter by Laurann Dohner

When his Veslor grouping answers a distress call on planet Biter, Roth discovers a sole survivor. The little female isn’t rational and latches onto him like a lifeline. That surprises Roth, since most humans fear him. This one won’t let him go, but he must resist his desire for her. It’s the only honorable thing to do.

Stuck on an alien planet, her facility sabotaged and all her coworkers dead or dying, Vera Wade isn’t sure she’ll make it out alive. They’ve all been exposed to a drug that is making them crazy. She’s slowly losing all hope, until an alien shows up. He feels real, but he’s probably just another hallucination. A sexy one who seems too good to be true.

Now she just needs to convince Roth that their attraction is definitely real, once the drugs leave her system…before the unknown person trying to kill her finishes the job.