Clean contemporary romance with suspense elements.

What does a biology teacher know about private investigating? Annie Prentice, the biology teacher in question, is about to find out. She needs to locate her sister's killer, so she goes undercover as a housekeeper in Jared McNeal's house. He needs to find whoever or whatever is scaring off his housekeepers so he'll actually keep one. If Annie and Jared don't learn to trust each other soon, even as they're falling in love, they might not live long enough to discover who's after the McNeal treasure.