Question: What nationality is the author of the book Dark Slayer ?

full_context: Document 1: The Dark Heroine: The Dark Heroine is a series of vampire-themed fantasy romance novels written by English author Abigail Gibbs, published by HarperCollins in 2012. The first novel in the series, "Dinner with a Vampire," revolves around London-born Violet Lee, who is kidnapped and held hostage by a Royal Family of vampires known as the Varns. The series is told from both Violet Lee and Kaspar Varn's perspective, the latter being heir to the Vamperic Throne in the novel.
Document 2: The Vampire Huntress Legend Series: The Vampire Huntress Legend Series (VHL) is a twelve book series written by Leslie Esdaile Banks under the pen name L.A. Banks. The series centers around a young "twenty-something" woman named Damali Richards who is a spoken word artist but is also the Neteru, a human who is born once every thousand years to fight the Dark Realms. Her most dangerous and most constant enemy from The Dark Realms are vampires.
Document 3: Nancy Warren (author): Nancy Warren is a Pacific Northwest author of contemporary romance novels. She received her first publication contract after winning Harlequin's 2000 Summer Blaze contest. Since then, she has released 30 novels and novellas, been twice nominated for the Romance Writers of America's RITA Award, and won a "Romantic Times" Reviewers' Choice Award.
Document 4: Dark Slayer: Dark Slayer is the twentieth title in Christine Feehan’s Dark Series, a series of paranormal/romances featuring the Carpathians (race).
Document 5: The Slayers d20: The Slayers d20 Role-Playing Game is a 2003 role-playing game published by Guardians of Order based on the anime series "Slayers". The title refers to the title under which Central Park Media released the three seasons of the television series.
Document 6: Christine Feehan: Christine Feehan (b. Christine King in California) is an American romance-paranormal writer. She has published more than 40 novels, including five series, and numerous novellas since 1999.
Document 7: Night Huntress: Night Huntress is a series of "New York Times" bestselling urban fantasy romance novels by author Jeaniene Frost. The first novel was published in 2007 by Avon and takes place in a world where supernatural creatures exist but are not known to the general public at large. The series initially focused around the character of half-vampire Catherine "Cat" Crawfield and her full-vampire lover Bones, but eventually shifted focus to other characters such as Vlad Tepesh, a character that Frost had initially not planned to include.
Document 8: Jane Feather: Jane Feather, née "Jane Robotham" (born 1945 in Cairo, Egypt) is a popular British–American writer of historical romance novels. In 1984 she wrote five contemporary romances under the pseudonym Claudia Bishop. She now is a New York Times bestselling, award–winning writer and she has more than ten million romance novels in print.
Document 9: C. J. Cherryh: Carolyn Janice Cherry (born September 1, 1942), better known by the pen name C. J. Cherryh, is an American writer of speculative fiction. She has written more than 60 books since the mid-1970s, including the Hugo Award-winning novels "Downbelow Station" (1981) and "Cyteen" (1988), both set in her Alliance-Union universe. She is known for "world building," depicting fictional realms with great realism supported by vast research in history, language, psychology, and archeology. Her series of fantasy novels set in the Alliance-Union universe, the Morgaine Stories, have sold in excess of 3 million copies.
Document 10: Fifty Shades Darker: Fifty Shades Darker is a 2012 erotic romance novel by British author E. L. James. It is the second instalment in the "Fifty Shades" trilogy that traces the deepening relationship between a college graduate, Anastasia Steele, and a young business magnate, Christian Grey. The first and third volumes, "Fifty Shades of Grey" and "Fifty Shades Freed", were published in 2011 and 2012. The novel is published by Vintage Books and reached No. 1 on the "USA Today" best seller list.
Document 11: 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 12: Keri Arthur: Keri Arthur is a writer of fantasy, horror fiction, and romance novels from Melbourne, Australia. She began writing at the age of twelve and has finished twenty-six novels as of July 2012. Her books have received many nominations and prizes, including nods from the Romantic Times Reviewers' Choice Awards and PNR's PEARL Awards. Is known mainly for her paranormal romance novels such as Full moon rising, Kissing Sin to name two of her award winning novels. She is married and has one daughter.
Document 13: List of prolific writers: Some writers have had prolific careers with hundreds of their works being published. While some best-selling authors have written a small number of books that have sold millions of copies, others have had lengthy careers and maintained a high level of output year after year. Dame Agatha Christie, the most-published novelist in history, is estimated to have sold 4 billion books, having written 69 novels and 19 plays. Her works were published between 1920 and 1976, equating to around three publications every two years. Dame Barbara Cartland has also sold millions of copies of her books but wrote many more than Christie. She spent 80 years as a novelist with 722 books published, averaging one book released every 40 days of her career. While Cartland wrote a significant number of full-length novels, other authors have been published many more times but have specialised in short stories. Spanish author Corín Tellado wrote over 5,000 novellas, selling 400 million copies of her books.
Document 14: 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 15: Lorraine Heath: Lorraine Heath is a New York Times and USA Today bestselling American author of contemporary romance, historical romance, paranormal romance and young adult novels under multiple pen names, including Rachel Hawthorne, J.A. London, and Jade Parker. She is known for her "beautiful, deeply emotional romances" and in 1997, she received the Romance Writers of America RITA Award for Best Short Historical Romance for her novel "Always to Remember". As of June 2015, fifteen of her titles made the "USA Today" bestseller list.
ground_truth: American