When the Zodiac killings began in 1968, Robert Graysmith, employed at the San Francisco Chronicle, became fascinated with the case. Before the murder spree was over, Zodiac claimed 37 victims. His mocking notes to authorities dared them to catch him. They never did. Now after following the clues for thirty years, Graysmith provides the final chapter-with hundreds of never-before-published photos and the only complete reproduction of the Zodiac letters.