Call of Cthulhu RPG: Cults of Cthulhu + PDF

Cults of Cthulhu gives you the rules to inject fully-realized and unique Cthulhu cults directly into your campaigns, and create your own antagonists. The tome also contains three scenarios featuring insidious Cthulhu cults spanning from the Gaslight era to the modern day.
It also includes a detailed history of the various cults of Cthulhu, spanning from the Victorian Era all the way to the modern day - perfect for any era of Call of Cthulhu play. The book also includes five distinct cults, ready for use in your games plus a guide how to create your own cults

There are also three scenarios included concerning Cthulhu cults across time:

Angel's Thirst

Los Angeles, 1923. The search for a missing taxi driver kicks off an investigation tainted by the criminal underworld, and perhaps something darker.

Loki's Gift

London, 1896. A tragedy in an upper-class family sees the investigators employed to look into the truth behind a beloved son’s demise