House of Leaves by Mark Z. Danielewski (I RECOMMEND GOING INTO THIS ONE BLIND) if you like dark and messy story lines, you'll love this book. a difficult read but definitely worth it.
In Silent Graves by Gary A. BraunbeckSynopsis:https://www.goodreads.com/book/show/19140.In_Silent_Graves i just started reading this book, but when i say it will take you on a trip starting with chapter one, i mean it. to give you an idea of what i'm talking about, i bawled my eyes out reading this book (and i don't think i'm even close to being 1/3 of the way through the book).
i have so many more books i'd recommend but i believe these three are a great start. all varying in reading level and style (my personal opinion), they're wonderful choices for those who like fantasy and horror.