What’s the title?

Hi, I’m trying to figure out what a movie is called I watched it a long time ago. Basically a group of friends maybe 5-6 go stay at like a cabin in the woods, which is a pretty common theme among movies I feel like. But I remember that there was like a creepy guy who was like next door or something and he would always watch them. And then I also remember one of the friends finding a book in the cabin and it had something to do with like this guy raising his kids in the woods with wolves. And 2 of the friends in the group were like raised by the dad and the wolves in the woods but the brother and sister like lured them to this cabin to kill them or something. I watched it when I was super super young so maybe it doesn’t exist and I’m making it up. But if anyone has any ideas please let me know. I watched the cabin in the woods and there was a book they found they read but it didn’t have anything to do with wolves or siblings.