Murder in the South of France by Susan Kiernan-Lewis

http://www.amazon.com/Murder-France-Maggie-Newberry-Mystery-ebook/dp/B005GY0Y8S

Maggie Newberry is a whip-smart advertising copywriter who’s fast on her feet and a little stunned to realize that she’s over 30 and still hasn’t found true love. When her long-missing sister ends up dead, Maggie flies to the south of France to find the little niece that no one in the family even knew existed. Along the way, she finds handsome, sexy Frenchman Laurent Dernier to help search for the girl. Meanwhile, her sister’s murderer sets his sights on the little girl—and Maggie.