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?

<P0-S0> 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. <P0-S1>  "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. <SEP> <P1-S0> This is a list of the cast members from The Twilight Saga film series, which is based on the novels by Stephenie Meyer. <P1-S1>  The main stars of the films are Kristen Stewart as Bella Swan, Robert Pattinson as Edward Cullen, and Taylor Lautner as Jacob Black. <P1-S2>  "Twilight" (2008) is based on the "New York Times" best selling novel of the same name (2005) and was directed by Catherine Hardwicke. <P1-S3>  The second film, "" (2009) is based on the first book's sequel (2006). <P1-S4>  It was directed by Chris Weitz. <P1-S5>  The third film, "", directed by David Slade, was released on June 30, 2010. <P1-S6>  and is based on the third installment in the series (2007). <P1-S7>  The filming of Breaking Dawn pt 1 started on November 1, 2010. <P1-S8>  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. <P1-S9>  The film grossed over $712 million worldwide. <P1-S10>  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. <P1-S11>  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> <P2-S0> Twilight is a series of four vampire-themed fantasy romance novels by American author Stephenie Meyer. <P2-S1>  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. <P2-S2>  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. <P2-S3>  The unpublished "Midnight Sun" is a retelling of the first book, "Twilight", from Edward Cullen's point of view. <P2-S4>  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. "" <P2-S5> , a definitive encyclopedic reference with nearly 100 full color illustrations, was released in bookstores on April 12, 2011. <SEP> <P3-S0> 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. <P3-S1>  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). <P3-S2>  A paperback edition was issued by Ballantine Books in 1974.