The turn of the screw is one of my favourites. Lord of No Time also was great.
I love Fantasy-themed books that also have a bit of gothic approach or have something to do with medieval witchery. I'm always curious about that kind of topics and i watch a lot of movies like that and also my kind of music.
I would have to say a book series that really influenced me as a kid was the Goosebumps series by R.L. Stine. Was some of the most scariest books I have read in a while. It influenced my life quite a bit and made me think of the interesting situations the books put the characters in.