I'm not sure how I came up with the subtitle. A more descriptive one would be: Get The Necronomicon!
I had scratched out these variant rules a while ago, suddenly decided to fully playtest and type them out this weekend, and am now finally submitting them... only to find that Timo (above in the Optional Rules: English/German) beat me to some of the revisions! I'd say just pick and choose your favorite bits... and add some new terror to your game! Enjoy!
(last page is a one-page chart summary)