Yesterday it was confirmed that Stieg Larsson's fourth book for the Millennium series (aka, the next Twilight) exists. He planned to make the series a total of 10 books before his 2004 death, but, as we now know, he did not get halfway through. He's not the first author to expire before wrapping up a project. Here are 10 unfinished books that were either published as found or edited for consumption by fellow writers.
Source: Flickr User hathu-