California was thrown into a paralysis of fear in 1969, distraught over the unsolved murders of the Zodiac killer. The Zodiac became the most elusive and frustrating adversary ever encountered by the law enforcement community in the San Francisco Bay Area. A series of letters, allegedly written by the murderer himself and published in local newspapers, only added to the mystery and panic. Over 30 years after he exploded onto the headlines of the San Francisco Chronicle, the Zodiac serial killer remains an enigma that is unparalleled in the history of crime in America, and the case remains...