Some time ago I stumbled across a book talking about the supposed history of Lovecraft's Mythos famous book, the Necronomicon. The book was named "Necronomicon", but it wasn't the real one, of course, although the authors do claim to have a part of it translated.
It says that John Dee's assistant, Edward Kelly, claimed to have been visited by the demon Asmodeus, who dictated him a manuscript. The manuscript itself was a series of boards written with Arabic figures and Latin letters. Kelly named referred to it as "The Book of Enoch". The message was so well encrypted that nobody managed to decipher it (not a lot of people tried, to be honest) until the appearance of modern technology.
One David Langford and his team of philologists managed to "crack" the code, revealing the message: It was a book, titled " Al-Azif, The Necronomicon", and detailed history of the Elder Gods, how to invoke them, and so on. Very much like what Lovecraft talks about in his novels and short stories.
The authors claim that this is the proof of the existence of the Necronomicon, that's it's not just a book invented by Lovecraft to be used in his stories.
Strange thing is, I don't know if this book I am talking about is intended as a fiction novel in tribute to Lovecraft or as an actual documentary/investigation.
