"Breaking Dawn" is the last published book in this series so far. Midnight Sun is her next project. She has not yet finished writing it (and there is no timeline set up, so we all need to put a lot of effort into being patient for a while longer).
“The more I wrote, the more I became convinced that Edward deserved to have his story told. At first I was planning to post it all here on my website, but I changed my mind for two reasons, the most important being that Edward's version is much longer than Bella's—Edward over-thinks everything. I'm not even half way done, and the page count is near three hundred. The second reason that I changed my mind is a little bit silly—I just would really love to have a pretty, matching, bound version of Midnight Sun to put beside Twilight on top of my desk. So I'm going to try to have it published as a complementary novel to Twilight. It will take a while, because I can only work on it between editing stints, but I hope that someday I'll be able to see Midnight Sun on the bookstore shelves next to Twilight, New Moon, Eclipse, and etc.”
Ms. Meyer's direct quote.
Yes, Breaking Dawn is the last book in the Twilight series. However, there is another book that is going to be published soon. It is going to be called Midnight Sun. It is Twilight re-written from Edwards point-of-view. There was an unauthorizied copy released online which forced the author to release it on her webpage. You can read part of it there. It is excellent.
Yes Breaking Dawn is the last book in the Twilight series. Twilight, New Moon, Eclipse, and Breaking Dawn. That is the order the 4 books were in. There has also been 5 movies of the Twilight series however these were because there was a Part 1 and Part 2 of Breaking Dawn. Midnight Sun is a possibility but since it was leaked online I do not think she will want to finish it.
Yes, Breaking Dawn is the last book in the Twilight's chronological order. There is a book and a half out there that Meyer wrote which are the Second life of Bree Tanner and Midnight Sun. I say a book and a half since only one of the books are finished, The Short Second life of Bree Tanner was published where as Meyer never finished writing Midnight Sun which is basically the first Twilight but from Edwards Perspective.