Anyone know of some great fiction or non-fiction books dealing with ghosts, demons or anything paranormal?

Rosemary's Baby was one of my favorites.  As well as The Omen.

I would be interested in other suggestions, too.

A few years back I read The Black Hope Horror by Robert Curran and found it to be very creepy.  It is non-fiction and about  a TX couple who move into a new home and later find out their home & surrounding neighbors' homes have been built over an old African American cemetary.  Don't want to give too much away but lets just say alot of bad stuff happens including a few deaths and some other spooky events and the book includes actual newspaper articles about the families plight.  It's kind of hard to get hold of a copy- but if you do, I think you'll like it.  I found myself getting spooked when I read it home alone.

Here's  list of the ghost-related paranormals I read last year, with reviews:

http://yourehistory.wordpress.com/tag/paranormal/

Christopher Fowler's Spanky is a great book dealing with demons.  All of his paranormal books are quite good, but Spanky is a personal favorite.  It's not currently the system though.  If you enjoy short stories, More City Jitters is available.