On August 26, 1960, twenty-three-year-old Danish cyclist Knud Jensen, competing in that year's Rome Olympic Games, suddenly fell from his bike and fractured his skull. His death hours later led to rumors that performance-enhancing drugs were in his system. Though certainly not the first instance of doping in the Olympic Games, Jensen's death serves as the starting point for Thomas M. Hunt's thoroughly researched, chronological history of the modern...