Cthulhu Britannica: Folklore presents a uniquely British vision of Lovecraftian horror where fairies, witches, and folk traditions intertwine with the dreadful, eldritch powers and otherworldly terrors of the Cthulhu Mythos. The book features:
- A folklore bestiary, including fairy folk, shape-shifters, giants, little folk, black dogs, dragons, water horses, bodily horrors, and much more
- A folklore calendar and a new 1920s profession —the folklorist— for players
- Detailed sections on using folklore and folk magic for Call of Cthulhu Keepers
- And nine Folklore Mythos threats that can introduced into any scenario or campaign, or used as single-session scenarios
