This is a must have for anyone running multi-splat chronicles in the Chronicles of Darkness. It provides a framework of rules and lore reasons for why different splats should work together to overcome a greater nemesis.
Myself with a few others have been building a shared wester marshes style chronicle world using the Contagion as a basis. But, this can easily work for smaller scale chronicles and provides a number of plot hooks and pre-made settings.
[5 of 5 Stars!]