The Book of Wizzy - Ann Chamberlin

Eighteen-year-old Brittany Bingham is working as a housekeeper for posh condominiums in Park City when she discovers a body in a hot tub. Dead. Brittany’s parents are serving an LDS mission in Southern California. Whom should she call?
Why, her aunt Helen Snow, of course. 
But Helen has her own problems. She’s still mourning the loss of a daughter with Down syndrome who died fifteen years ago at age three. Though Wizzy’s sweet, angelic spirit visits her every day, no one understands that she’s the source of her inspiration, just as no one can know Helen’s celestial marriage is on the rocks. Should Helen accept her bishop’s call to be Relief Society president and tune out everything else, even Wizzy? Or should she respond to Brittany and learn how handsome Dave Jaramillo died?
Are yams appropriate in a compassionate-service casserole?
Who will kidnap the dog Horehound?
And forget about the sins of tea and coffee. Who drank the kombucha?