Seeds of Evil
‘The Black Book’ is simply the name given to this item by occult investigator, Alan Wolff. The item has no title and is written entirely in the Chonic Alphabet, and was likely used by the Tannhauser Bruderschaft (or written by some of their sinister agents).
The text seems to have some ancient rituals outlined but they are difficult to decipher without the proper knowledge of the language. Currently, it is in the possession of Dr. Edgar Blackford as he is attempting to unlock some of the secrets.