Question: How many copies have been sold of a four book series featuring Bella Swan and Edward Cullen?

Context articles: Jacob Black
Edward Cullen
Twilight (novel series)
Midnight Sun (Meyer novel)
New Moon (novel)
Twilight (2008 film)
Eclipse (Meyer novel)
Breaking Dawn
Twilight: The Graphic Novel
Stephenie Meyer

Jacob "Jake" Black is a character in the "Twilight" series by Stephenie Meyer.
 He is described as an attractive Native American of the Quileute tribe in La Push, near Forks, Washington.
 In the second book of the series, he discovers that he can shapeshift into a wolf.
 For the majority of the series, Jacob competes with Edward Cullen for Bella Swan's love.
 In the films "Twilight", "New Moon", "Eclipse", "", and "", Jacob is played by Taylor Lautner.
Edward Cullen (né Edward Anthony Masen) is a fictional character in Stephenie Meyer's "Twilight" series.
 He is featured in the books "Twilight", "New Moon", "Eclipse" and "Breaking Dawn", and their corresponding film adaptations, and the as yet unfinished novel "Midnight Sun"—a re-telling of the events of "Twilight" from Edward's perspective.
 Edward is a telepathic vampire who, over the course of the series, falls in love with, marries, and has a child with Bella Swan, a human teenager who later chooses to become a vampire as well.
 In the "Twilight" film series, Edward is played by actor Robert Pattinson.
Twilight is a series of four vampire-themed fantasy romance novels by American author Stephenie Meyer.
 Released annually from 2005 through 2008, the four books chart the later teen years of Isabella "Bella" Swan, a girl who moves to Forks, Washington, and falls in love with a 104-year-old vampire named Edward Cullen.
 The series is told primarily from Bella's point of view, with the epilogue of "Eclipse" and Part II of "Breaking Dawn" being told from the viewpoint of character Jacob Black, a werewolf.
 The unpublished "Midnight Sun" is a retelling of the first book, "Twilight", from Edward Cullen's point of view.
 The novella "The Short Second Life of Bree Tanner", which tells the story of a newborn vampire who appeared in "Eclipse", was published on June 5, 2010, as a hardcover book and on June 7 as a free online ebook. ""
, a definitive encyclopedic reference with nearly 100 full color illustrations, was released in bookstores on April 12, 2011.
Midnight Sun is an unreleased companion novel to the book "Twilight" by author Stephenie Meyer.
 The work retells the events of "Twilight", but is written from the perspective of Edward Cullen instead of that of the series' usual narrating character Bella Swan.
 Meyer stated that "Twilight" was to be the only book from the series that she planned to rewrite from Edward's perspective.
 To give them a better feel of Edward's character, Meyer allowed Catherine Hardwicke, the director of the film adaptation of "Twilight", and Robert Pattinson, the actor playing Edward, to read some completed chapters of the novel while they shot the film.
New Moon is a romantic fantasy novel by author Stephenie Meyer, and is the second novel in the "Twilight" series.
 The novel continues the story of Bella Swan and vampire Edward Cullen's relationship.
 When Edward leaves Bella after his brother attacks her, she is left heartbroken and depressed for months until Jacob Black becomes her best friend and helps her fight her pain.
 However, her life twists once more when Jacob's nature reveals itself and Edward's sister decides to visit.
Twilight is a 2008 American romantic fantasy film based on Stephenie Meyer's popular novel of the same name.
 Directed by Catherine Hardwicke, the film stars Kristen Stewart and Robert Pattinson.
 It is the first film in "The Twilight Saga" film series.
 This film focuses on the development of the relationship between Bella Swan (a teenage girl) and Edward Cullen (a vampire), and the subsequent efforts of Edward and his family to keep Bella safe from a coven of evil vampires.
Eclipse is the third novel in the "Twilight" Saga by Stephenie Meyer.
 It continues the story of Bella Swan and her vampire love, Edward Cullen.
 The novel explores Bella's compromise between her love for Edward and her friendship with shape-shifter Jacob Black, along with her dilemma of leaving her mortality behind in a terrorized atmosphere, a result of mysterious vampire attacks in Seattle.
Breaking Dawn is the fourth novel in "The Twilight Saga" by American author Stephenie Meyer.
 Divided into three parts, the first and third sections are written from Bella Swan's perspective and the second is written from the perspective of Jacob Black.
 The novel directly follows the events of the previous novel, "Eclipse", as Bella and Edward Cullen get married, leaving behind a heartbroken Jacob.
 When Bella faces unexpected and life-threatening situations, she willingly risks her human life and possible vampire immortality to undergo the ultimate transformation from a weak pawn to the strong queen with unique powers to fight the final battle to save all those she loves.
Twilight: The Graphic Novel is a 2 part comic book miniseries by Young Kim, an adaptation of the first thirteen chapters of "Twilight" by Stephenie Meyer.
 Volume 2 was released on October 11, 2011.
 On October 2012 Volume 1 and Volume 2 were put into one book for a collectors edition that included extras in the back of the book about 5 of the characters (Carlisle Cullen, Edward Cullen, Bella Swan, Jacob Black, and Esme Cullen.
 On April 23, 2013 volume one of the "" (the second book in the Twilight Series) came out.
Stephenie Meyer (née Morgan; ; born December 24, 1973) is an American young adult fiction writer and film producer, best known for her vampire romance series "Twilight".
 The "Twilight" novels have gained worldwide recognition and sold over 100 million copies, with translations into 37 different languages.
 Meyer was the bestselling author of 2008 and 2009 in America, having sold over 29 million books in 2008, and 26.5 million books in 2009.
 "Twilight" was the best-selling book of 2008 in US bookstores.