Kingdoms of Savannah by George Dawes Green; 2022. Hardcover.

A man is murdered and his companion has disappeared. An unlikely detective, Morgana Musgrove, doyenne of Savannah society, is called upon to unravel the mystery of these crimes. Morgana is an imperious, demanding, and conniving woman, whose four grown children are weary of her schemes. But one by one she inveigles them into helping with her investigation, and soon the family uncovers some terrifying truths