This image is the cover for the book Fountain of Death, The Gregor Demarkian Holiday Mysteries

Fountain of Death, The Gregor Demarkian Holiday Mysteries

As New Year’s approaches, a former FBI investigator—“the Armenian-American Poirot”—resolves to find the killer of a Connecticut exercise guru (Kirkus Reviews).
  After twenty years in California, Frannie Jay—formerly Frances Jakumbowski—returns to her home turf: New Haven, Connecticut, a university town that has become rife with crime. The depressed aerobics instructor hopes to find new life at the Fountain of Youth—a workout studio whose weight trainer, Tim Bradbury, is the best in the business. But Frannie’s fresh start turns sour just before New Year’s, when she finds Bradbury in the bushes outside the studio, stark naked and stone dead. Former FBI investigator Gregor Demarkian comes to New Haven to assist the local police. Bradbury died of arsenic poisoning—a fate no amount of exercise can stave off—and any instructor and client in the studio could have killed him. Demarkian’s body may not be rock hard, but his mind is sharp, and he will see to it that the next weights the killer lifts will be in the prison yard.

Jane Haddam

Jane Haddam (1951–2019) was an American author of mysteries. Born Orania Papazoglou, she worked as a college professor and magazine editor before publishing her Edgar Award–nominated first novel, Sweet, Savage Death, in 1984. This mystery introduced Patience McKenna, a sleuthing scribe who would go on to appear in four more books, including Wicked, Loving Murder (1985) and Rich, Radiant Slaughter (1988).
 
Not a Creature Was Stirring (1990) introduced Haddam’s best-known character, former FBI agent Gregor Demarkian. The series spans more than twenty novels, many of them holiday-themed, including Murder Superior (1993), Fountain of Death (1995), and Wanting Sheila Dead (2005). Haddam’s later novels include Blood in the Water (2012) and Hearts of Sand (2013).