That is a playlist of the songs that Stephenie listened to when 書く the book. The film prodoucers, director, and 音楽 editors look to her 一覧 just like they did with Twilight and try to incorprate some of the 音楽 she has on her 一覧 into the film. So far I know Muse, The All-American Rejects, and possibly Blue October, will be on the soundtrack. I also know that Band of Skulls, The Used, Milow, and Radiohead's Thom Yorke and Bon Iver were also being looked at to 登録する the soundtrack.
So the 一覧 Stephenie has up on her page was some of the 音楽 she listen to when 書く the book and the B,J and E were from who's point of view the song was coming from.