I was on Stephenie Meyer's website when I found the story behind Twilight and New Moon. They are really amazing and you guys have to read them!! I learned that Stephenie Meyer began writing on June 2, 2003 (that should be a holiday now) and I learned that Bella and Edward came to her in a dream. she does not have the story behind Eclipse, but at the end of the story behind New Moon this is what she says:
I'm writing book four at this moment in time, and let me tell you, Forks is a very exciting place to be these days.
the story behind Twilight:
http://www.stepheniemeyer.com/twilight.html
The story behind New Moon:
http://www.stepheniemeyer.com/nm_thestory.html