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

full_context: Document 1: Richelle Mead: Richelle Mead (born November 12, 1976) is a bestselling American fantasy author. She is known for the "Georgina Kincaid" series, "Vampire Academy", "Bloodlines" and the "Dark Swan" series.
Document 2: Breaking Dawn: 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.
Document 3: List of Twilight cast members: This is a list of the cast members from The Twilight Saga film series, which is based on the novels by Stephenie Meyer. The main stars of the films are Kristen Stewart as Bella Swan, Robert Pattinson as Edward Cullen, and Taylor Lautner as Jacob Black. "Twilight" (2008) is based on the "New York Times" best selling novel of the same name (2005) and was directed by Catherine Hardwicke. The second film, "" (2009) is based on the first book's sequel (2006). It was directed by Chris Weitz. The third film, "", directed by David Slade, was released on June 30, 2010. and is based on the third installment in the series (2007). The filming of Breaking Dawn pt 1 started on November 1, 2010. The Twilight Saga: Breaking Dawn – Part 1 (commonly referred to as Breaking Dawn – Part 1) released in theatres on November 18, 2011, and released to DVD on February 11, 2012 in the United States. The film grossed over $712 million worldwide. The Twilight Saga: Breaking Dawn – Part 2 (commonly referred to as Breaking Dawn – Part 2) was released on November 16, 2012, by Lionsgate in the United States, in consequence of the merger between Lionsgate and Summit Entertainment. The film (101 days in release) was a box-office success, grossing over $829 million worldwide, becoming the 34th highest-grossing film, the 6th highest-grossing film of 2012 and the highest-grossing film of the Twilight series.
Document 4: Bella Swan: Isabella Marie "Bella" Swan (later Bella Cullen) is a character and the protagonist of the "Twilight" series, written by Stephenie Meyer. The "Twilight" series, consisting of the novels "Twilight", "New Moon", "Eclipse", and "Breaking Dawn", is primarily narrated from Bella's point of view. In the film series, Bella is portrayed by actress Kristen Stewart.
Document 5: Twilight: The Graphic Novel: 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.
Document 6: Jeaniene Frost: Jeaniene Frost is an American fantasy author, known for her work on the "New York Times" and "USA Today" bestselling "Night Huntress" series and the "Night Huntress World" novels. Foreign rights for her novels have sold to nineteen different countries.
Document 7: The Twilight Saga: New Moon: The Twilight Saga: New Moon, commonly referred to as New Moon, is a 2009 American romantic fantasy film based on Stephenie Meyer's 2006 novel "New Moon". It is the second film in "The Twilight Saga" film series and is the sequel to 2008's "Twilight". Summit Entertainment greenlit the sequel in late November 2008, following the early success of "Twilight". Directed by Chris Weitz, the film stars Kristen Stewart, Robert Pattinson, and Taylor Lautner, reprising their roles as Bella Swan, Edward Cullen, and Jacob Black, respectively. Melissa Rosenberg, who handed in a draft of the film script during the opening weekend of "Twilight", returned as screenwriter for "New Moon" as well.
Document 8: Twilight (Meyer novel): Twilight (stylized as twilight) (2005) is a young adult vampire-romance novel by author Stephenie Meyer. It is the first book in the "Twilight" series, and introduces seventeen-year-old Isabella "Bella" Swan, who moves from Phoenix, Arizona to Forks, Washington. She is endangered after falling in love with Edward Cullen, a vampire. Additional novels in the series are "New Moon", "Eclipse", and "Breaking Dawn".
Document 9: The Twilight Saga (film series): The Twilight Saga is a series of five romance fantasy films from Summit Entertainment based on the four novels by American author Stephenie Meyer. The films star Kristen Stewart, Robert Pattinson, and Taylor Lautner. The series has grossed over $3.3 billion in worldwide receipts and consists, to date, of five motion pictures. The first installment, "Twilight", was released on November 21, 2008. The second installment, "", followed on November 20, 2009, breaking box office records as the biggest midnight screening and opening day in history, grossing an estimated $72.7 million. The third installment, "", was released on June 30, 2010, and was the first "Twilight" film to be released in IMAX.
Document 10: Midnight Sun (Meyer novel): 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.
Document 11: The Twilight Saga: Eclipse: The Twilight Saga: Eclipse, commonly referred to as Eclipse, is a 2010 American romantic fantasy film based on Stephenie Meyer's 2007 novel "Eclipse". It is the third installment of "The Twilight Saga" film series, following 2008's "Twilight" and 2009's "". Summit Entertainment greenlit the film in February 2009. Directed by David Slade, the film stars Kristen Stewart, Robert Pattinson, and Taylor Lautner, reprising their roles as Bella Swan, Edward Cullen, and Jacob Black, respectively. Melissa Rosenberg, who penned the scripts for both "Twilight" and "New Moon", returned as screenwriter.
Document 12: Twilight (2008 film): 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.
Document 13: Twilight (novel series): 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.
Document 14: Stephenie Meyer: 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.
Document 15: Eclipse (Meyer novel): 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.
ground_truth: over 100 million