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This guide lists six books about the Zodiac Killer case whose titles, authors and years were confirmed in at least two independent library catalogs. It is for readers who want to go beyond the short version: the original reporter's account, a young-adult overview, a book on the ciphers, and a history of Bay Area crime. The Zodiac Killer has never been identified, and any book that names one is giving its author's conclusion, not a settled fact.
Between December 1968 and October 1969, an unidentified attacker killed at least five people in the San Francisco Bay Area and sent taunting letters, some with ciphers, to newspapers. The 340-character cipher, known as Z340, was solved in December 2020, and the decoded message did not name the killer. The FBI's investigation is still listed as open. Our explainer, The Zodiac Killer: What the Ciphers and Evidence Actually Show, covers the documented case and the 2021 Gary Francis Poste claim, which the FBI has not endorsed.
- At a Glance
- The 6 Books
- 1. Zodiac by Robert Graysmith
- 2. Zodiac Unmasked: The Identity of America's Most Elusive Serial Killer Revealed by Robert Graysmith
- 3. Shooting Zodiac by Robert Graysmith
- 4. The Zodiac Killer by Carla Mooney
- 5. Unsolved! The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret Societies by Craig P. Bauer
- 6. The Murders That Made Us by Bob Calhoun
- How to Choose Where to Start
- How to Read Any Book on the Zodiac Killer Critically
- What the Record Shows
- How We Verified These Titles
- Frequently Asked Questions
- Keep Reading
At a Glance
| Book | Best for | Type |
|---|---|---|
| Zodiac (Robert Graysmith) | The earliest title here, from a former Chronicle reporter | Nonfiction |
| Zodiac Unmasked (Robert Graysmith) | Reading one author’s identification critically | Nonfiction |
| Shooting Zodiac (Robert Graysmith) | The case and its portrayal on film | Nonfiction |
| The Zodiac Killer (Carla Mooney) | A short, clear overview | Nonfiction (young readers) |
| Unsolved! (Craig P. Bauer) | The ciphers, in the context of other unsolved codes | Nonfiction |
| The Murders That Made Us (Bob Calhoun) | The Zodiac case inside 170 years of Bay Area crime | Nonfiction |
The 6 Books
1. Zodiac by Robert Graysmith
Nonfiction. Published 1986, St. Martin's/Marek.
Open Library describes it as a nonfiction book about the unsolved serial murders in San Francisco in the late 1960s and early 1970s, and the author is described elsewhere in the catalog as a former San Francisco Chronicle reporter. It was published in 1986, which means it predates the 2020 solution of the Z340 cipher. Start here if you want the earliest account in this list.
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2. Zodiac Unmasked: The Identity of America's Most Elusive Serial Killer Revealed by Robert Graysmith
Nonfiction. Published 2002, Berkley Books.
The sequel presents the author's own conclusion about who the killer was. That is a theory. Our explainer notes that no suspect has been confirmed by law enforcement and the case remains officially open, so read this one as an argument to be weighed against the record, not as a resolution of it.
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3. Shooting Zodiac by Robert Graysmith
Nonfiction. Published 2021, Monkey's Paw Publishing.
The Library of Congress lists David Fincher as a subject, with the headings “Zodiac Killer in motion pictures” and “Serial murder investigation, United States, History.” It runs to 359 pages with maps and illustrations. It suits readers who came to the case through the 2007 film and want a book that links the two.
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4. The Zodiac Killer by Carla Mooney
Nonfiction (young readers). Published 2019, Essential Library, an imprint of Abdo Publishing.
Catalogued as juvenile literature, with Duffy Jennings listed as content consultant. Open Library and K10plus date it to 2019, while the Library of Congress record says 2020, so the year is given both ways. At 112 pages with a bibliography and index, it is the quickest way into the facts, and the format makes it suitable for a younger reader.
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5. Unsolved! The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret Societies by Craig P. Bauer
Nonfiction. Published 2017, Princeton University Press.
The Library of Congress contents list includes chapters titled “Zodiac” and “More killer ciphers,” so the Zodiac material is part of a wider survey, not the whole book. It was published in 2017, three years before the Z340 cipher was solved, so use it for the history of the ciphers and for how cryptanalysts think, not for the 2020 solution, which our explainer covers.
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6. The Murders That Made Us by Bob Calhoun
Nonfiction. Published 2021.
Open Library's description calls it the 170-year history of the San Francisco Bay Area told through its crimes, naming the Zodiac Killer and the kidnapping of Patty Hearst among them. It will not give you a case file, but it places the 1968 to 1969 attacks in the context of the region's history.
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How to Choose Where to Start
- If you want the foundational account: Zodiac (1986).
- If you want a short overview or a book for a younger reader: The Zodiac Killer by Carla Mooney.
- If the ciphers are what interest you: Unsolved!, then read our explainer for the 2020 solution.
- If you want context: The Murders That Made Us, or Shooting Zodiac for the film.
- If you read Zodiac Unmasked, read it as one author's theory.
How to Read Any Book on the Zodiac Killer Critically
- Check the year against December 2020, when the Z340 cipher was solved. Zodiac (1986), Zodiac Unmasked (2002), The Zodiac Killer (2019) and Unsolved! (2017) came earlier, so they cannot describe the solution.
- Separate the five confirmed deaths from attacks the killer only claimed. A careful book says which is which.
- Treat any identification of the Zodiac Killer as a claim. The 2021 naming of Gary Francis Poste by a private group has not been endorsed by the FBI, and our explainer notes the absence of court-tested physical evidence.
- Remember that a solved cipher confirms what a message said. It does not identify the person who wrote it.
What the Record Shows
Keep the record in view while you read. Law enforcement confirmed five deaths tied to the case, along with other attacks the Zodiac Killer claimed that were never definitively linked. The earliest cipher, Z408, was solved in 1969; Z340 was solved in 2020 by three independent codebreakers with FBI confirmation; the shorter Z13 remains unsolved. Solving a cipher confirmed what a message said, but it did not supply forensic evidence identifying anyone. For the neighboring case in California that is also unsolved, see The Black Dahlia: What's Actually Known.
How We Verified These Titles
Every book above was matched against at least two independent bibliographic sources before it was listed: Open Library, the Library of Congress catalog, and the K10plus union catalog, which pools German library records. Title, author and publication year had to agree in at least two of them, and a publisher is named only where a second source also names it. Where catalogs disagree about an edition year, we say so in the entry. Descriptions come from catalog subject headings, subtitles, and publisher or library descriptions we could read; we did not use ratings, sales ranks, awards or cover images, and we do not call any book the most accurate or the most complete, because we have not audited their contents. “Best” here means verifiably real, clearly described and different from the others on the list. Titles we could confirm in only one catalog, or whose details conflicted, were left out, which is why this guide lists six books and not ten. Catalog checks were made in October 2026, and editions and availability change, so confirm the edition before you buy.
Frequently Asked Questions
Which book should I start with on the Zodiac Killer?
Robert Graysmith's Zodiac (1986) is the earliest title in this list, by a former San Francisco Chronicle reporter. If you want something shorter, Carla Mooney's The Zodiac Killer is a 112-page overview written for young readers. If the ciphers interest you most, Craig Bauer's Unsolved! covers them within a wider survey of unsolved codes.
Does any book name the Zodiac Killer?
Some name a suspect, as their author's conclusion. Graysmith's Zodiac Unmasked (2002) presents his own identification. Our explainer notes that no suspect has been confirmed by law enforcement, the FBI's case remains open, and the solved Z340 cipher did not name the killer. Treat any named suspect as a theory.
Is there a book that covers the Zodiac ciphers?
Craig Bauer's Unsolved! (Princeton University Press, 2017) includes chapters titled “Zodiac” and “More killer ciphers” in the Library of Congress contents list. Because it was published before December 2020, it does not cover the solution of the Z340 cipher, which our explainer describes.
Is there a book about the Zodiac film?
Robert Graysmith's Shooting Zodiac (2021) is catalogued by the Library of Congress under David Fincher, criticism and interpretation, and Zodiac Killer in motion pictures. It also carries the subject headings serial murder investigation and United States history, so it covers the case as well as the film.
Are these books safe for younger readers?
Only The Zodiac Killer by Carla Mooney is catalogued as juvenile literature. The others are not catalogued as juvenile and deal with real murders. We have not reviewed the content of each book page by page, so check the title yourself before giving it to a younger reader.
Why does this list include only six books?
We only list books whose title, author and year match across at least two independent library catalogs. Other titles on the Zodiac Killer case exist, but we could confirm them in only one catalog, or their years disagreed, so we left them out rather than guess. Every book here has a checkable record.
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Keep Reading
- The Zodiac Killer: What the Ciphers and Evidence Actually Show
- The Black Dahlia: What’s Actually Known About the 1947 Murder
- 7 Best Books About Lizzie Borden
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