When I think of Halloween reads, I immediately think of Anne Rice. If you enjoy vampire tales, try INTERVIEW WITH A VAMPIRE or THE VAMPIRE LESTAT. If you prefer witches, try any of the books in the Witches of Mayfair series.
For contemporary paranormal, try Charlaine Harris's Sookie Stackhouse series, inspiration for the hit show True Blood. Probably best to start at the beginning with DEAD UNTIL DARK.
If you want a non-paranormal Halloween read, pick up Ray Bradbury's SOMETHING WICKED THIS WAY COMES. The psychological horror story takes place in small-town Illinois one week before Halloween when an eerie Carnival rolls into town and begins to destroy the lives of everyone who participates in its attractions.
Lastly, what Halloween would be complete without the Horror-master himself, Stephen King? My favorites include THE TOMMYKNOCKERS, IT, and THE SHINING even though they all kept me up for days.