Polo's Ponies — Jerry Kennealy

Nick Polo's energetic third adventure embroils him in a bodily harmful racetrack betting scheme. After explaining horse-racing terminology for journalist girlfriend Jane at the Golden Gate Fields racetrack, Polo stumbles across the body of a small-time bookie who worked for his Uncle Pee Wee. At his uncle's request, Polo tracks down the murderer, questioning a crooked trainer, a randy jockey, a sadistic owner, and others.