Watch the amazing Locus juggle several books at once, and try not to drop any! Free admission.
I'm in! This should be fun: my favorite holiday and two of my favorite genres!
Horror or Mystery?
BOTH!
Although lately, I've had a harder time finding good horror. I prefer creepy, unexplainable events style horror to slasher stories; in fact, the less violence the better. It's scarier when it's implied, and just at the edges of one's peripheral vision.
For mysteries, I like old-fashioned whodunnits (Christie!) or cozies (there's a great series I read based around a cross stitch store, whose title I can't remember at the moment).