Father S published few books on his occult vampirism. I definitely must give him points for name of the book: Sanguinomicon. It gave me idea to create my own version of artistic vampiric Ankh. The book itself contains some occult knowledge that feels like written by beginner with nice creativity. It made an impression of not the worst first work, that should be followed by much better rework of his system. Since the book was published 14 years ago, if Father S was into occult, he should by now do at least some progress. (even miserable occultist me is learning a little as the time goes) I'm not aware of any newer works of his.
Also there is an interesting blog post on Father S by vampire role-players community, that shows doing quite some work on the man. Older, but I believe, that it's relevant.