Basic Premise: Useful resources for CoC keepers (GMs).
As I recall, this is a relatively small, "splat"-book sized folder of a few random bits and bobs for running the game. It's all 1920s campaign-based. There are character sheets and a scenario to run. The keeper screen is pretty useful. None of the items in here are what I would call must-haves, but they are handy. I'm always happy to have an extra scenario on hand for when my idea well is running dry.