Fearnet has an interview with Melissa Rosenberg where they talk Eclipse, Bree Tanner, Breaking Dawn and more.
How early on did Stephenie share with you the events and character details that made it into her new Twilight novella, The Short Second Life of Bree Tanner?
It would have been in the outline stage. I knew from the beginning that I wanted to introduce Riley; that was one of my first ideas: let’s open on Riley and how he was created. Coming up with a back story for him and all of that. I think I had probably finished a draft of the outline, it was somewhere around then, and I was asking [Stephenie] about what the newborns were up to — what was going on for them while Bella’s living her life, because they’re living it simultaneously? And that’s when she shared it with me and I was really able to fill out some of their activities and how Riley was directing them. So it was right there in the beginning.
Read it all here. (Warning! The interview does have some spoilers in it.)