Zodiac [UNABRIDGED]

A sexual sadist, his pleasure was torture and murder. His first victims were a teenage couple, stalked and shot dead in a lover’s lane. After another slaying, he sent his first mocking note to authorities, promising he would kill again. The official tally of his victims was six. He claimed thirty-seven. The real toll may have reached fifty. He was never caught. In taunting letters sent to the newspapers, he hid clues to his identity using cunning ciphers that defied the greatest code breaking minds of the CIA, the FBI, and NSA.