[Sleeping Beauty]

J.K. Rowling didn't steal Tolkien or anyone else's ideas. So much has been written in the world, you could say pretty much anyone could be stealing from anyone. It's hard to come up with new ideas, especially in fantasy that hasn't already been done before. I mean, Gandalf was not the first wizard. There are some such as Merlin in the legends of King Arthur that came before him. Just because something is similar to something else, doesn't mean it was stolen. J.K. Rowling probably was trying to think of a big huge monster and thought of spider and decided to make Aragog one. Just because two authors happen to use the same idea does not necessarily mean it was taken from the other one.