Disappointed with Rosemary's baby. Looking for wildly different suggestions

Recently I visited a very secluded place. Before going on the trip I wanted to pick up a very spooky book so I can read it on the secluded place for the optimum horror experience. Based on reviews I picked up Rosemary's book. While it was good I guess, most of the horror elements unfolded at the end of the book.

I would like to read something that gives me these beautiful scary feelings along the way. For instance, I really liked The Exorcist by William Blaty. Looking for more suggestions like it.

I don't have much experience with horror books. I have read both of Shirley Jackson's books though.