I heard that there were "Necronomicons" that people had written out of inspiration of Lovecraft's writings.
(Where did you get that? I would have no idea where to look... You can't just walk into a library and go "Do you have the Necronomicon?")
It's become clear that the creator's have drawn inspiration from the darker side of literature, and it is not uncommon that writers have kept coming back to it (Stephen King is an example).
But I am skeptical if in the end the ceremony is supernatural in nature. Bree has already said that the religion is a front, just a way for them to make money and whatever else they are up to.
Oh, and what kind of Metal Via? Ha ha, that is the only thing I can talk about and not BS about it.