Horror stories.
 

Can anyone recommend any good horror books for me?

Why, yes I can. If you're new to horror, I'd say that short story collections are the way to go. Here's a few to get you started.

Clive Barker - The Books of Blood
Thomas Ligotti - The Nightmare Factory (Good luck finding it, and no, I won't sell you my copy.)
Robert Aickman - Cold Hand in Mine
Peter Straub - Houses Without Doors
Tim Lebbon - Fears Unnamed
Harlan Ellison - The Essential Ellison
Ramsey Campbell - Cold Print
Caitlin R. Kiernan - To Charles Fort, With Love

Any of the "Best New Horror" collections edited by Stephen Jones are a good place to start too.

In The Dark by Richard Layman is a gteat book

The shadow over Insmouth & At the Mountains of Madness from Lovercraft.

An Occurrence at Owl Creek Bridge from Ambrose Bierce´


The Fall of the House of Usher and The Masque of the Red Death from Poe (Roger Corman's films were great too)

Ray Bradbury's Something Wicked This Way Comes.

not really horror .. more 'alternative fiction' like harland ellison

my favorite book of all time.

Dan Simmons' 'Carrion Comfort' is fantastic, as are his short stories. Actually, his story 'The River Styx Runs Upstream' got me into reading, and later writing, horror. You can find the story in the collection 'Prayers to Broken Stones'.