![](https://zodiackiller.net/wp-content/uploads/2021/07/Zodiac-On-The-Web-1.jpg)
David Oranchak’s ZodiacKillerCiphers.com
Richard Grinell’s ZodiacCiphers.com
Michael Butterfield’s ZodiacKillerFacts.com
Michael Cole’s ZodiacRevisited.com
San Francisco Chronicle Zodiac beat reporter Kevin Fagan
To order ‘The Case of the Zodiac Killer’ co-authored by Mike Morford, visit this link