Jorge was the brother of the MacFarlane family's longtime fishing guide; Carla, girlfriend of Frankies brother. But when the Tucson murder victims turn out to be Frankies colleague, Frankie joins the hunt for the killers, bringing her geologists eye and analytical skills to aid sheriffs detective Toni Navarro and private investigator Philo Dane.

Finalist, Mountains & Plains Independent Booksellers Award, Adult Fiction ForeWord Book of the Year Award, Honorable Mention After the murderous rigors of her Ph.D. field research, Frankie MacFarlane is happy to be settling down in her native Tucson, house-sitting the family home and teaching geology at Foothills Community College. Little does she imagine that a brief fishing trip to Mexico with her brother Jamie and his girlfriend, Carla, could entangle her in a string of murder, mythology, and international intrigue. Nonetheless, Frankie responds in true form. Noticing every nuance of her surroundings, both natural and manmade, Frankie skids through a heart-stopping and unforgettable chase from the Sea of Cortez to Tucson’s Sabino Canyon.