“Finally, a Zodiac book I can GLOWINGLY recommend.”

Tom Voigt

Zodiac case expert who has appeared in countless Zodiac Killer documentaries. Owner of zodiackiller.com.

“Rich with insights about the quagmire of legal, social, psychological, and political challenges The Zodiac’s modus operandi uniquely presented to the community at large, it’s hard to put down this true crime story, which blends elements of a thriller into a meticulous historical probe that leaves no stones unturned…

The Zodiac may have gone away, but Cole’s book certainly won’t vanish in the reader’s mind any time soon.”

D. Donovan, Senior Reviewer

Midwest Book Review

“Michael Cole’s book, The Zodiac Revisited, brings a fresh level of deep research and unique contour to this long unsolved case.  He not only reviews the crimes in extraordinary detail but also pursues fascinating and sometimes unexpected possibilities that add dimension to the puzzle. Whether the reader is new to this perennial mystery or a master of the facts of the case, this book offers an innovative and captivating interpretation with much food for thought.”

Michael Kelleher, PhD

Zodiac case expert and co-author of "This is the Zodiac Speaking: Into the Mind of a Serial Killer".

“I highly recommend [The Zodiac Revisited] to anybody wanting to learn about the Zodiac Killer story…you can guarantee that every aspect of [Michael’s] presentation has been thoroughly researched and well-thought-out.

Richard Grinell

Zodiac case expert and owner of zodiacciphers.com.

“…Cole meticulously lays out the details of the case, along with new insights and threads of theories that he will ultimately examine in this series’ remaining volumes.”


“Michael Cole’s ‘Zodiac Revisited’ series cuts through the intimidating onslaught of case information, and deftly extracts a comprehensive collection of fact-based details and evidence.  This series of books is a must-have for anyone who takes this case seriously!”

David Oranchak

Zodiac cipher expert and member of the three-person team who solved the killer's 340 cipher 51 years after its original publication.

“Cole put a lot of care and detail into these pages, and it shows. His ear for the details surrounding the case is pitch perfect. Tune in if you’re ready for the case of a lifetime.”

Independent Book Review

This rigorously detailed book focuses on all of the unfortunate victims and the particulars leading up to their murders. Cole’s concise, unadorned prose lets the unnerving facts of the case speak for themselves. …it’s a wealth of information that will surely rouse interest in the analyses and speculations that will appear in the sequel.” – Kirkus Reviews

“The narrative includes abundant cultural contextualization—about the civil rights movement, the Vietnam War, and the movie The Exorcist—revealing the time period in which the serial killer was active well. This helps to make it more than just a rehashing of hard facts: Cole reveals a tangible moment in history. His writing is smart and objective; its only assumptions and analyses come from law enforcement officers and detectives. Sans sensationalism and speculation, this is an academic, accessible text.”

Foreword Clarion Reviews

Incredibly informative on the facts of the case, the possible explanations, and why investigators to this day still have not solved this cold case, any lover of true crime would thoroughly enjoy what this book has to offer.

San Francisco Book Review

“Cole’s descriptions of the lives and personalities of those who fell to this tragic fate serve to memorialize them, if not bring them back to life. Hence the service performed by the author’s book is great indeed.”

The US Review of Books