it's the first book of twilight from edwards point of view.. but it's not coming out because when stefanie was writing it she showed it to a couple of her friends and one of them posted it online.. so she decided not to publish it...
It's Twilight from Edward's point of view, and it's a really interesting read. Personally, I prefer it to Twilight.
The first couple of chapters were leaked onto the internet and you can read it here: link
It was meant to be the fifth Twilight book. Stephenie Meyer had written about 15 chapters of Midnight Sun which was pretty much the same thing as Twilight but from Edward's point of view instead of Bella's.
Unfortunately, someone took those 15 chapters and posted them online for everyone to read. Stephenie Meyer was very disappointed at that point and did not finish writting the book...
But that was a few years ago. If you want to read it, it's probably easy to find online. I haven't read it because I was hoping she would finish her book but she apparently gave up on it so I might read it sooner or later.