When it comes to Stephen King's horror books, there's usually no need to read the source material before seeing the adaptation. In many cases, people will encounter films like The Shiningor It long before they get the chance to pick up their book counterparts. And seeing them first doesn't take away from the magic of reading King's stories. In many cases, there are differences that make it well worth picking up both. And King's books tend to land, whether you've seen the adaptation or not, as they're masterfully crafted.