In Kathy Reichs’ fifteenth Temperance Brennan novel, Bones are Forever, forensic anthropologist Tempe Brennan is looking for the killer of three infants in Yellowknife, a remote diamond mining town in the Northwest Territories of Canada. Andrew Ryan, Tempe’s ex, is heading up the investigation, which only gets more complicated when Ollie Hasty, another ex and a sergeant with the Royal Canadian Mounted Police, shows up.