Robert McCammon's short story Something Passed By. You can find it online at his site: Robert McCammon » Robert R. McCammon's "Something Passed By"
I would have to say 1984, because there is nothing scarier than not being able to escape, even in your mind.
When I was 13 I read the Amityville Horror Trilogy and I would read it through the night and it honestly felt like someone was watching me while I read it... Like the house could see me.
I don't really read scary books, probably because when I was in the 7th grade I was reading a scary book called "Hit and Run" but I got so scared that I buried it under a bunch of papers and books in the bottom of my locker and it stayed there the rest of the year. I never finished reading it and when I cleaned my locker out I just left the book in there. I'm sure if I read it now, I would probably laugh at how silly I had been.