What does Book of Shadows stands for in title of movie Blair Witch 2?

I can't find anything definitive, but:

1. The two main characters are researching the Blair Witch for a book they are writing.


2. The characters are a Wiccan and a Goth Psychic.


3. A "Book of Shadows" is a Wiccan text containing spells, rituals, etc.


4. The television show 'Charmed' was wildly popular at the time and the "Book of Shadows" is a critical element to the show.


5. The "Book of Shadows" is never mentioned in the movie.

Based on those items, barring anything else definitive, I think the title is tenuous and convenient and has nothing to do with the movie itself.