In the 1960's and early 1970's, the infamous Zodiac Killer terrorized the California Bay Area and mesmerized the rest of the country with a haunting string of unsolved murders and violent attacks. With seven confirmed victims, including five brutal fatalities, the Zodiac eluded police for years, taunting them with bizarre ciphers and threatening letters. Authorities challenged the Zodiac to create another of his famous cryptograms and reveal his identity. With his outrageous ego at stake, the killer responded by sending them the 340 Cipher... which was never solved. But now, 47 years later, in his book Zodiac Code: Solved! author Michael D. Sechrest - with the historical advantage of all the killers' enigmatic correspondence, taunting clues, and cryptic lyrics from Gilbert and Sullivan - has finally cracked the 340 Cipher. The Zodiac killer's TRUE IDENTITY is exposed at last in his own confession! Mr. Sechrest, a board certified trial expert, has accomplished what the homicide investigators and code-cracking experts, have set out to do over the last 50 years...solve the Zodiac Killer Code. He is so certain of the solution, he wagers $10,000.00 against all readers.

Robert Graysmith’s New York Times bestselling account of the desperate hunt for a serial killer and his own investigation of California’s unsolved Zodiac murders. A sexual sadist, the Zodiac killer took pleasure in torture and murder. His first victims were a teenage couple, stalked and shot dead in a lovers’ lane. After another slaying, he sent his first mocking note to authorities, promising he would kill more. The official tally of his victims was six. He claimed thirty-seven dead. The real toll may have reached fifty. Robert Graysmith was on staff at the San Francisco Chronicle in 1969 when Zodiac first struck, triggering in the resolute reporter an unrelenting obsession with seeing the hooded killer brought to justice. In this gripping account of Zodiac’s eleven-month reign of terror, Graysmith reveals hundreds of facts previously unreleased, including the complete text of the killer’s letters.

Robert Graysmith reveals the true identity of Zodiac—America's most elusive serial killer. Between December 1968 and October 1969 a hooded serial killer called Zodiac terrorized San Francisco. Claiming responsibility for thirty-seven murders, he manipulated the media with warnings, dares, and bizarre cryptograms that baffled FBI code-breakers. Then as suddenly as the murders began, Zodiac disappeared into the Bay Area fog. After painstaking investigation and more than thirty years of research, Robert Graysmith finally exposes Zodiac’s true identity. With overwhelming evidence he reveals the twisted private life that led to the crimes, and provides startling theories as to why they stopped. America’s greatest unsolved mystery has finally been solved. INCLUDES PHOTOS AND A COMPLETE REPRODUCTION OF ZODIAC’S LETTERS

A comprehensive collection of police reports related to the unsolved mystery of the Zodiac Killer unsolved mystery

From the New York Times bestselling author of Black Dahlia Avenger Former LAPD detective Steve Hodel compiles never-before-seen evidence that reveals his father as a serial killer who may have been responsible for some of the most infamous murders of the last century- including the Zodiac killings.

If you liked Dan Brown’s Da Vinci Code—or want to solve similarly baffling cyphers yourself—this is the book for you! A thrilling exploration of history’s most vexing codes and ciphers that uses hands-on exercises to teach you the most popular historical encryption schemes and techniques for breaking them. Solve history’s most hidden secrets alongside expert codebreakers Elonka Dunin and Klaus Schmeh, as they guide you through the world of encrypted texts. With a focus on cracking real-world document encryptions—including some crime-based coded mysteries that remain unsolved—you’ll be introduced to the free computer software that professional cryptographers use, helping you build your skills with state-of-the art tools. You’ll also be inspired by thrilling success stories, like how the first three parts of Kryptos were broken. Each chapter introduces you to a specific cryptanalysis technique, and presents factual examples of text encrypted using that scheme—from modern postcards to 19-century newspaper ads, war-time telegrams, notes smuggled into prisons, and even entire books written in code. Along the way, you’ll work on NSA-developed challenges, detect and break a Caesar cipher, crack an encrypted journal from the movie The Prestige, and much more. You’ll learn: How to crack simple substitution, polyalphabetic, and transposition ciphers How to use free online cryptanalysis software, like CrypTool 2, to aid your analysis How to identify clues and patterns to figure out what encryption scheme is being used How to encrypt your own emails and secret messages Codebreaking is the most up-to-date resource on cryptanalysis published since World War II—essential for modern forensic codebreakers, and designed to help amateurs unlock some of history’s greatest mysteries.

The true identity of the psychotic ZODIAC killer has been known by the Mandamus Seven (group of retired law enforcement officers, federal agents, a minister, and a District Attorney) since March 15, 1971. This true story is now being told for the very first time. Official corruption and political intervention forced the investigation into a top secret, covert status, giving the insane ZODIAC killer immunity and a license to kill. His motive -- adultery! Mind and body ravaged by years of severe alcoholism, his blood-lusting revenge turned him into the most shocking and vicious killer in our 20th century. Through his tauntings of the police, his codes, ciphers, and letters, he was on a mission to redeem his shattered ego, to prove that he was better, smarter, and more clever than all the judges and police put together. With lordly arrogance and jealousy and with the assistance of the police, he continued his killing spree until he claimed a total of 37 victims. Lips sealed by secret oaths and federal obstructions of justice, the investigation was further impeded by personal associations with the suspect and his tenacious, intrepid wife, placing family members in imminent danger. The evidence is overwhelming and given the totality of the facts, it is the author's opinion that there is no jury in the world that would not find the suspect guilty of being the criminal genius, ZODIAC.

"In 1953, a man was found dead from cyanide poisoning near the Philadelphia airport with a picture of a Nazi aircraft in his wallet. Taped to his abdomen was an enciphered message. In 1912, a book dealer named Wilfrid Voynich came into possession of an illuminated cipher manuscript once belonging to Emperor Rudolf II, who was obsessed with alchemy and the occult. Wartime codebreakers tried--and failed--to unlock the book's secrets, and it remains an enigma to this day. In this lively and entertaining book, Craig Bauer examines these and other vexing ciphers yet to be cracked. Some may reveal the identity of a spy or serial killer, provide the location of buried treasure, or expose a secret society--while others may be elaborate hoaxes. Unsolved! begins by explaining the basics of cryptology, and then explores the history behind an array of unsolved ciphers. It looks at ancient ciphers, ciphers created by artists and composers, ciphers left by killers and victims, Cold War ciphers, and many others. Some are infamous, like the ciphers in the Zodiac letters, while others were created purely as intellectual challenges by figures such as Nobel Prize-winning physicist Richard P. Feynman. Bauer lays out the evidence surrounding each cipher, describes the efforts of geniuses and eccentrics--in some cases both--to decipher it, and invites readers to try their hand at puzzles that have stymied so many others. Unsolved! takes readers from the ancient world to the digital age, providing an amazing tour of many of history's greatest unsolved ciphers"--

Cybersecurity experts from across industries and sectors share insights on how to think like scientists to master cybersecurity challenges Humankind’s efforts to explain the origin of the cosmos birthed disciplines such as physics and chemistry. Scientists conceived of the cosmic ‘Big Bang’ as an explosion of particles—everything in the universe centered around core elements and governed by laws of matter and gravity. In the modern era of digital technology, we are experiencing a similar explosion of ones and zeros, an exponentially expanding universe of bits of data centered around the core elements of speed and connectivity. One of the disciplines to emerge from our efforts to make sense of this new universe is the science of cybersecurity. Cybersecurity is as central to the Digital Age as physics and chemistry were to the Scientific Age. The Digital Big Bang explores current and emerging knowledge in the field of cybersecurity, helping readers think like scientists to master cybersecurity principles and overcome cybersecurity challenges. This innovative text adopts a scientific approach to cybersecurity, identifying the science’s fundamental elements and examining how these elements intersect and interact with each other. Author Phil Quade distills his over three decades of cyber intelligence, defense, and attack experience into an accessible, yet detailed, single-volume resource. Designed for non-specialist business leaders and cybersecurity practitioners alike, this authoritative book is packed with real-world examples, techniques, and strategies no organization should be without. Contributions from many of the world’s leading cybersecurity experts and policymakers enable readers to firmly grasp vital cybersecurity concepts, methods, and practices. This important book: Guides readers on both fundamental tactics and advanced strategies Features observations, hypotheses, and conclusions on a wide range of cybersecurity issues Helps readers work with the central elements of cybersecurity, rather than fight or ignore them Includes content by cybersecurity leaders from organizations such as Microsoft, Target, ADP, Capital One, Verisign, AT&T, Samsung, and many others Offers insights from national-level security experts including former Secretary of Homeland Security Michael Chertoff and former Director of National Intelligence Mike McConnell The Digital Big Bang is an invaluable source of information for anyone faced with the challenges of 21st century cybersecurity in all industries and sectors, including business leaders, policy makers, analysts and researchers as well as IT professionals, educators, and students.

An explosive and historic book of true crime and an emotionally powerful and revelatory memoir of a man whose ten-year search for his biological father leads to a chilling discovery: His father is one of the most notorious-and still at large-serial killers.