I found Salem's Lot and The shining pretty scary reading. I think it all depends on your situation too e.g. alone in a big house in the middle of nowhere - I'd probably get the jitters reading Pride & Prejudice. One book that did spook me was Red Dragon by Thomas Harris. I lived in a house that had a lot of glass and backed onto black nothingness after dark. I chose a bad time to start reading it, my husband was working away and I was alone in the house with a very young baby. It scared the bejesus out of me and I had to stop reading it. Every time the back security light came on during the night my heart almost stopped, for weeks I practically slept with the phone in my hand. I did eventually finish it a number of years later.