London in the 1920s is the greatest city in the world, a vibrant melting pot of history and culture at the heart of the British Empire. But underneath the powerhouse of the City lie millennia of history, from the well-documented paths of Roman Londinium to darker antediluvian secrets veiled from modern eyes. London sits atop its history: an ancient swampland that was itself once an even-more-ancient sea-bed. Who knows what secrets lie buried?
The Cthulhu Britannica: London boxed set comprises three books:
The Investigator's Guide to London
The Keeper's Guide to London
Adventures in Mythos London.