I read at least one scary book per October. I think the best one I tried this time around was Thomas Harris’s Red Dragon. It fell apart a bit at the end, but I was on codeine at the time so my opinion is suspect.
I’ll let someone else defend horror today, but if you’re just now getting the jones for a scare, some successful Mormons in the field to check out include Michaelbrent Collings, Dan Wells, and Ben Hopkin.
Zarahemla has put out a few frighteners: Dispirirted, Brother Brigham (out of print), Angel Falling Softly (out of print).
Most importantly, as always, Monsters & Mormons. You can’t do better than that on Halloween.