Personally , I don't think there's any chance that JK and that Vander Ark will work together. And I don't think JK should , either. Come on! Harry Potter is her great achievement after 17 year's hard working! Why should she share it with others? Yeah, Vander Ark has added his own interpretation. So what? I believe most of us have some , too! Besides, in the article JK said that if Vander Ark's lexicon was published, she would hardly have the will to continue with her encyclopedia. Then whose work will you want to read? Of course we'll choose JK's!