Dead Water (Roderick Alleyn Series #23) in Bloomington, MN

The elderly Emily Pride is pleased to have inherited an island, yet appalled by the "Pixie Falls" spring and its reported miraculous healing properties, and especially the locals’ attempts to capitalize on the "miracles." The locals are not thrilled to give up their trade, but could their frustration have bubbled up into murderous rage? Inspector Alleyn will have to sort it out. And this time, it’s personal.