Question: In which year was the first of the vampire-themed fantasy romance novels for which The Twilight Saga: The Official Illustrated Guide serves as a spin-off encyclopedic reference book first published?

 "The Guide" includes exclusive new material about the world Meyer created in "Twilight", "New Moon", "Eclipse", "Breaking Dawn" and "The Short Second Life of Bree Tanner", and nearly a hundred full-color illustrations by illustrator Young Kim, who previously illustrated Meyer's #1 "New York Times" Best Seller "", and several other artists. The Twilight Saga: The Official Illustrated Guide (previously titled The Official Guide) is a spin-off encyclopedic reference book for the "Twilight Saga" book series, written by Stephenie Meyer and was released on April 12, 2011. <SEP> 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. <SEP>  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. Twilight is a series of four vampire-themed fantasy romance novels by American author Stephenie Meyer.  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. <SEP> A Guide to Middle-earth was the first published encyclopedic reference book for the fictional universe of J. R. R. Tolkien's Middle-earth, compiled and edited by Robert Foster.  The book was published in 1971 by Mirage Press, a specialist science fiction and fantasy publisher, in a limited edition of 2000 copies (750 numbered hardcovers and 1250 unnumbered paperbacks).  A paperback edition was issued by Ballantine Books in 1974.