Racing the Moon by Michele Hauf

When the full moon rises, his urgent sexual desire becomes overpowering…and satisfying his demanding lust is the one way he can stop his transformation.
But now he’s stranded in the middle of nowhere, with a storm raging outside, and moonrise imminent. And only the beautiful stranger who rescued him can keep the wolf at bay. Only, she’s resisting his ardent seduction with all her might.

It’s not that she doesn’t ache for him every bit as hungrily as he does for her. Their mutual attraction is fierce and explosive. But they are very different species…and surrendering to her desire will call forth something much more terrifying than the wolf.