wow i have never even heard of this book. what do あなた mean によって it is the sequel to breaking dawn but its not によって stephanie meyer? is that true? who is it buy? sorry that i haven't actually answered your 質問 but i haven't even heard of this new book. what country do あなた live in? maybe it hasn't been released in aus yet.
Go to that website. Its just a ファン fiction thing online. I don't think its an official novel that they sell in stores. I don't even think they could sell it. Stephenie Meyer owns the rights to the Twilight series and unless she gave them permission to do it they can't.