Wicked Ways Series by Audrey Brice

Some treasure should be left buried. Klaus, the new King of the Northrop vampires, has lost a sacred relic. Something the vampires treasure. The vampire council is breathing down Klaus’s neck. Being the most visible witch in a fifty-witch town means Klaus has come to me, Elise Marybell Marple, owner of the magic shop Wicked Ways, and my vampire best friend, Shelly, to help him find it before he’s dethroned by the council. Have I mentioned that angry, ancient vampires creep me out?

Eye of newt, leg of frog...Northrop's annual baking contest has been sabotaged! I'm Elise Marybell Marple, owner of the magic shop, Wicked Ways. It's up to me and my friends to figure out why the contestants are transforming before our eyes.  When the transformations start hitting a little too close to home, my demon boyfriend, who's having infernal issues of his own, may need to help me out. Can we find the witch responsible? Or will some of the residents of Northrop be changed forever?