Bewitched, Bothered, and Biscotti (Magical Bakery #2) by Bailey Cates (Obsidian mass market, 31 December 2012).
Katie Lightfoot and her friend Declan are having a breakfast picnic in the park when they spot a man lying under the bushes. Upon further investigation, they realize the man is no longer alive, and call the police.
The dead man turns out to be Lawrence Eastmore, an art instructor at the Savannah College of Art and Design, and a member of an exclusive men's club called the Dragohs, as their president Heinrich Dawes informs her. Katie's friend Steve, who happens to be Heinrich's son, inadvertently reveals that the Dragohs are also druids who are obsessively protective of their privacy.
Although Katie has already decided she won't involve herself in any more murder cases, she is drawn into it anyway.
There's definitely no sophomore slump here; this is a fantastic sequel to Brownies and Broomsticks. It helps to have read that book first, but it's not necessary. The volume also contains a few recipes from Katie's Honeybee Bakery.
FTC full disclosure: Many thanks to the publisher for a review copy of the book.