A lot of people discount Stephen King, but his stuff can be very thought-provoking. Unfortunately, I picked up "The Stand" to read one night in college when a cold with drippy nose was keeping me awake.... Needless to say, I didn't sleep a wink and just kept reading for a day and a half.
(For those of you that don't remember or didn't read it, it's an apocalyptic story whose vector starts with the sniffles)
I agree about modern horror movies being about the gore quotient, but I still watch them. Thought "Hostel" probably wrecked the tourism industry for Slovakia. One of the silliest I saw (and darned if I can remember the title) was a foreign film about killer mutant sheep. It was just hokey through and through when it could've been so much fun (like "End of the World" about a bad pub crawl which really was kind of amusing in the long run)
Pretty good. Over 800 pages. That's because they MADE him cut almost 400 more pages before they would publish. After 25 years or so, he published the whole thing. Still his best.