We conclude this countdown with the bestselling author of the 21st century, JK Rowling. The conspiracy theory comes courtesy of Norwegian filmmaker Nine Grunfeld, who refuses to believe that a working class, single-mother could pen a series of books that would go on to sell over 450 million copies. Grunfeld instead believes it more likely that the books were written by a large group of anonymous writers, content to churn out bestseller after bestseller while corporate forces hire an actress to play the role of writer. Whats more, JK Rowlings own back-story is also a cleverly written piece of fiction, a modern day rags-to-riches designed to instil hope to millions the world over. What is especially interesting about this conspiracy theory is that Nine Grunfeld hardly fits the model of the run-of-the-mill conspiracy obsessive. She is a critically acclaimed documentary-maker, the daughter of a leading psychiatrist. The gist of her argument is regards the so-called professionalism of the operation, asserting that there is too much marketing expertise in the Harry Potter industry for it to be anything other than a well orchestrated corporate fabrication. The obvious retort to Grunfelds claims, however, is the same that can be levelled at any number of apparent conspiracies. If so many people are involved in maintaining this Harry Potter empire, youd assume somebody wouldve let slip by now. What's the most outlandish literary conspiracy theory you've ever heard? Let us know in the comments below.