Lavender & Mistletoe by Donna Kauffman

This Christmas, small-town Blue Hollow Falls will work big holiday magic for two people who have researched everything but love . . .
Avery Kent needs a project. The busy brain that earned her two PhDs before the age of eighteen is fascinated by the home she’s created with her three friends in Blue Hollow Falls, but the farm and the tearoom are running like clockwork now. As the holiday season approaches, it’s time for Avery to dive into one of her last uncharted research topics: love. Not for herself, of course; for her friend, Chey! But a closer look at the handsome young veterinarian Avery has chosen for this romantic equation has her wishing for gifts she never thought she wanted . . .
Another former child prodigy, Ben Chandler is more like Avery than she ever imagined. His intellect is a perfect match for hers—and everything else about him attracts her in ways that send delicious tingles down her spine. But a relationship? That’s something Avery will need to analyze—unless her friends can help Ben convince her that romance is more magic than science, and that a good old-fashioned kiss under the mistletoe is the perfect way to open her heart to the possibility of the greatest gift of all . . .