It is an oldie, but nothing has ever equalled Bram Stokers’s Dracula.
But if you want some whimsey with your horror, I suggest the collected short stories of John Collier.
I think that Mark Z. Danielewski’s House of Leaves is the scariest book I’ve read, period, and I’m one of those guys that has a complete hardcover Lovecraft library. It’s mainly so effective because of its “documentary” style - it reads like an impartial, third-party report on a Blair Witch-esque film that contains some absolutely terrifying things caught on tape.
I really need to read Dracula one of these days. That does remind me, though: if you’ve not read Frankenstein, you’re missing out on some good stuff!
Daniel
Off-Season by Jack Ketchum.
I haven’t read that one. Do you remember the title?
I haven’t read Black House or Mr. X. Was it one of those?
I believe Black House was the sequel of sorts to The Talisman that was written by both Straub and King, so I don’t think that would be the one he was referring to, but I could be mistaken.
My vote would be for reading “The Talisman” and the sequel, “Black House,” which, as you’ve mentioned, were co-written by Stephen King and Peter Straub. Excellent books. I just recently re-read them. (I recently re-read “The Stand,” too - about my fifth time, too. What a fantastic book.)
I did in fact finish reading the Talisman not a couple of weeks ago, and I’m planning on picking up Black House as well, although as King books go, I found that The Talisman didn’t grip me as much as some of his other ones. Now the Stand on the other hand was an awesome book, and one that I have read many a time. Good way to kill a whole lot of hours, ha ha.
Kind of Dracula related (well, not really but … ) The List of Seven by Mark Frost
It has one of the single most scary scenes I’ve ever read - and I’ve read a lot of them!
You sound just like me. One of my favorites for a long time was Stephen King. I read everything by him…most of them twice. Save for The Stand and Needful Things, which I’ve read (both each) about four or five times.
So allow me to suggest to you any book by my new favorite author: Dean Koontz. If you like SK, I’m pretty sure you’ll like DK. He’s not as gory or graphic as SK is, but what he lacks in that department he makes up for with pure suspense and mind-numbing chills and terror. Seriously, I have not yet read a book by him I didn’t love. And he’s got a LOT of books written.
I’d start out with one of his older ones but not first ones. Like Watchers or Darkfall. Then branch out into ones like Door to December and Shadowfire…then, as you pick up speed with him, get into great ones like The Servants of Twilight and Twilight Eyes.
There are only three books I would NOT start out with concerning him and that would be Seize the Night, Forever Odd, and Brother Odd, but only because they are all books in a series and you should read their first counterparts…well…first. 
(Seize the Night’s first book is called Fear Nothing…and the first one in the Odd Series is called Odd Thomas)
His Frankenstein series is really good too.
I believe it was Shadowlands.
Daniel
Another vote for Fevre Dream by George R.R. Martin - vampires along the Mississippi River before and just after the Civil War. I still remember particular scenes and lines of dialogue from that book. Good, good stuff.
Martin also wrote the great novella Sandkings, in the short-story collection of the same name, about a bored, dissolute rich guy in the distant future who acquires some new pets… and then they acquire him. Heheheheheh.
Given your enthusiasm for Stephen King, you’ve probably read 'Salem’s Lot already. A classic modern vampire story. A recent special edition (with moody B&W photos) includes several outtakes and alternate scenes. For a fan, it’s like discovering a new vein of gold in the mine.
Press Enter* by John Varley is a great cyberhorror novella. Highly recommended.
Subscribing since the thread tools button doesn’t work on Citrix.
Just dropped by to suggest what AuntiePam already has. Thomas Tryon – The Other and Harvest Home. Two great reads, I’ll never forget how much they spooked me!
Savor my favorite Bram Stoker short story-
[The Dualitists; or, the Death Doom of the Double Born
By
Bram Stoker](http://www.geocities.com/psmcalduff/1dual.txt)
Also, a particularly nasty thriller I skimmed a few years ago still sticks in my mind -
GHOUL by Michael Slade.
Ah, okay. I remember liking that one. The magical nonsense must not have registered as nonsense. 
I forgot to mention Joe Lansdale. His Drive-In books are bloodbaths, but compelling reading. I like his non-horror best, particularly his Hap and Leonard books. Think Lethal Weapon but without any restraint. Seriously, those guys make Mel Gibson’s character look sane.
Seconding Sandkings, it’s a good’un.
Also seconding The List of Seven, mentioned above. There are some neato characters in this one.
When I finished The List of Seven, I turned back to Page 1 & started over. It’s an excellent novel. And terrifying.
(Another vote for Fevre Dream, listed above. Vampires on the Old Mississippi…)
How about Edgar Allan Poe. I didn’t really get him in high school, but now I get a good chill by the end of “The Raven”.
If you’re not a D&D dork, the names of the spells wouldn’t register as dorky, most likely. If you are, it’s completely bizarre to see them in that context, sort of as if the archvillain of 'Salem’s Lot had been named Count Chocula.
Daniel