Beneath the Surface - The Black Arrow, #1

It's every biologist's dream to discover new ecosystems, but when Alnilam found life on a planet reported to be uninhabited, her superior officer rewarded her discovery by dumping her overboard.  Plucked from the surface, she realizes she's been captured by people she can help. Now she has to convince them she can find the cure to the mystery bacterium infesting their city. Alnilam came equipped with translators, but even she can't comprehend why her sexy captors are the ones who are protecting her from the government that doesn't want her there.
These two men have every reason not to trust her, but she has to trust them if she has any hope for surviving in a culture that views Earthlings as an invasive alien force. As they share their world with her, her feelings for them force her to decide if she wants to stay on a plant that will never accept her, or find her way back to earth and leave her heart in the stars.