If you were to add a sentence to the page saying "Jack London was also the author of 'Lassie Come-Home,'" I would probably spot it and remove it within a day or two. You could, of course, put it back. Then I would probably remove it again and message you saying "No, it's a great book but it was written by Eric Knight, not Jack London. We could use an article on Eric Knight, by the way." And that would probably be the end of it.
That's often (increasingly, lately) not the end of it, and this is a major problem with Wikipedia which I seldom see officially addressed (although it's widely griped about).
Anyone have some sort of solution?