The story begins in Idaho, where celebrated horse owner and trainer H.R. Geiger has just died. His estate can't be settled until the book collection of his late wife, Candice, has been assessed. Enter Janeway, who discovers cheaper reprints cropping up among her priceless, mint-condition first editions (Dunning's descriptions of these, especially the children's stuff, are wonderfully juicy), suggesting theft and hasty substitutions. As is his habit, Janeway soon expands his mandate to an investigation of her mysterious death 20 years earlier. (Was she murdered by someone aware of her fatal allergy to peanuts?) Although Candice seems to have cast a spell over everyone she met, her marriage to this much older man was not happy; he, it seems, had potency problems --- hence her affairs and, ultimately, the "last fling" of the title.