Salem's Lot by Stephen King - I just love this vampire story. The tv miniseries from the 70's scared me.
The Mist by Stephen King - A group of people get trapped in a grocery store as a strange mist filled with dangerous creatures envelops the town. What's not to like?
The Travelling Vampire Show by Richard Laymon - This book is weird. It's a graphic vampire story mixed with a coming-of-age novel. Strange combination but it works for me.
First Evidence by Ken Goddard - This is the spookiest book I think I have ever read. It's about aliens rather than the supernatural but it scared the bejeebers out of me.
Swan Song by Robert R. McCammon - This book is reminiscent of Stephen King's The Stand but I find it to be far superior. It's the first McCammon book I ever read but not the last.
Boy's Life by Robert R. McCammon - This isn't strictly a horror book but it has elements of the supernatural and a creepy mystery to boot. I love this book. It's probably my second fave book after To Kill A Mockingbird.
The Bottoms by Joe R. Lansdale - Another not strictly horror book but a good, scary read nonetheless.
Fragments by James F. David - Again, not strictly horror but dealing with the supernatural and some pretty gruesome deaths. This is a really good book.
Hunter by James Byron Huggins - This is an awesome story about science and nature gone wrong and the man who has to take care of it.
Watchers by Dean Koontz - Another science/nature gone wrong story. Excellent. You really fall in love with the characters.
The Dresden Files series by Jim Butcher - Although it's been slipping quality lately, for the most part it's a solid series.
The Nightside Series by Simon R. Green - This series is so much fun. Green is one strange, creative guy.
Boneyard by Richard Moore - This is a series of comics about a guy who inherits a cemetary with some strange and funny inhabitants. Funny stuff.
The Harry Potter series by J. K. Rowling - I still can't believe how good these books are. Amazing.
Odd Thomas by Dean Koontz - The ending spooked and moved me all at the same time.