Graysmith was employed at the San Francisco Chronicle in 1968, when the serial killer known as Zodiac began methodically brutalizing and murdering random victims across California. Zodiac, who was something of an egomaniac, communicated with authorities via the Chronicle. In addition to gloating over the inability of law enforcement to capture him, he would often describe how he intended to kill his next victim or would recount in chilling detail the last moments of someone he had savagely slain. At least 37 gruesome murders were attributed to him in the state of California; however, competing investigations (because the murders happened in several different counties) and other mishaps led to his consistent evasion of authorities. In this excellent study of the case, Graysmith provides never-before-published photos, a complete reproduction of the Zodiac letters, and a scary and disturbing account of pure evil.