I'm sure you have heard a lot about Midnight Sun by now and if you haven't or if you don't know what it is, it's Edward's version of Twilight.
There have been tons of rumors that Midnight Sun may not be published because of the leaker. ( A leaker is a copy of a book that was leaked to the public, usually online, before it was supposed to be)
I really hope that Stephenie decides to realease it. The first 12 chapters are available on her website here's the link.