Disturbing horror book recommendations

So I just finished the dramatized audiobook of "The Black Farm", and it was the first horror book to genuinely cause anxiety and discomfort. That's what I want out of a horror book. Are there any that get as uncomfortable as that one? I heard there is a second one, but I am kind of waiting to listen to a dramatized audiobook of that one (I don't know if it exists yet).

I would prefer to read the book, but if there are good disturbing horror audiobooks I will definitely add it to my "listen to" list.