The Zodiac Killer is one of the most famous unsolved cases in modern history-but fame has distorted understanding. Over decades, speculation, media repetition, and pop-culture retellings have transformed a limited set of crimes into an enduring myth. Unknown Facts About the Zodiac Killer steps away from suspects, sensationalism, and false certainty to examine something far more revealing: how this case became impossible to close. Rather than asking who the Zodiac was, this book asks what happened to the case itself. Through a rigorous, unsensational analysis, it explores how media amplification replaced investigation, how fear traveled faster than facts, how cryptography functioned as performance rather than proof, and how institutional limits allowed absence to become power. The result is not a portrait of a criminal mastermind, but a clear-eyed examination of how modern societies construct-and preserve-unsolved mysteries. This book does not promise revelation or closure. It offers something rarer: proportion. By removing myth, repetition, and narrative excess, it reveals what the evidence actually supports-and why the Zodiac endures not because the truth is hidden, but because the structure surrounding the case learned how to function without answers. For readers interested in true crime, media psychology, and the mechanics of modern mythmaking, this is a study not of a killer, but of a system-and of what remains when the legend is stripped away.