Testament of Longinus
A stolen piece of secret Vampire lore.
A hastily-scanned and bound copy of this book was found on the shelves of the Mysterium Library Main Annex in New York City, though it is suspected other – and possibly more complete – versions exist elsewhere, given the depth of the annotations in the scanned copy.
The book details the supposed first vampire, Longinus, who killed Jesus Christ and was Damned by God for all eternity, as well as building up a whole vampiric religion based around a twisted Christian philosophy.
The text in its entirety can be found here: The Testament of Longinus.