Decryption of the Zodiac Z18 Code: and the "Anti-Z18" Code - Hardcover

What is the Zodiac Z18 Code?

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On August 1, 1969, three letters prepared by the Zodiac killer were received at the Vallejo Times Herald, the San Francisco Chronicle, and The San Francisco Examiner. Each letter also included one-third of a 408-symbol cryptogram which the killer claimed contained his identity. The killer demanded they be printed on each paper's front page or he would "cruse [sic] around all weekend killing lone people in the night then move on to kill again, until I end up with a dozen people over the weekend."

On August 8, 1969, Donald and Bettye Harden of Salinas, California, cracked the 408-symbol cryptogram. It contained a misspelled message in which the killer said he was collecting slaves for the afterlife. The solution to Zodiac's 408-symbol cipher reads as follows:

"I LIKE KILLING PEOPLE BECAUSE IT IS SO MUCH FUN IT IS MORE FUN THAN KILLING WILD GAME IN THE FORREST BECAUSE MAN IS THE MOST DANGEROUE ANAMAL OF ALL TO KILL SOMETHING GIVES ME THE MOST THRILLING EXPERENCE IT IS EVEN BETTER THAN GETTING YOUR ROCKS OFF WITH A GIRL THE BEST PART OF IT IS THAE WHEN I DIE I WILL BE REBORN IN PARADICE AND THEI HAVE KILLED WILL BECOME MY SLAVES I WILL NOT GIVE YOU MY NAME BECAUSE YOU WILL TRY TO SLOI DOWN OR ATOP MY COLLECTIOG OF SLAVES FOR MY AFTERLIFE EBEORIETEMETHHPITI"

The meaning, if any, of the final eighteen deciphered letters (EBEORIETEMETHHPITI) has never been determined with any certainty, though many have tried. These final 18 letters are often called the Zodiac Z18 cipher or code or cryptogram. For the first time, this book reveals the solution to the Zodiac Z18 code.