Question: Aaron S. Rosenberg, an American novelist and game designer, wrote what fantasy novel? 
Context: World of Warcraft: Beyond the Dark Portal is a fantasy novel written by Aaron S. Rosenberg and Christie Golden, and published by Simon & Schuster Pocket Star Books, a division of Viacom.  The novel is based on Blizzard Entertainment's Warcraft universe, and is a continuation of the events of the RTS PC game: (1995). Creature of Havoc is a single-player roleplaying gamebook written by British game designer Steve Jackson (not to be confused with the US game designer of the same name), illustrated by Alan Langford and originally published in 1986 by Puffin Books.  It was later republished by Wizard Books in 2002.  It forms part of Jackson and Ian Livingstone's fictional Fighting Fantasy series, and is the last Fighting Fantasy gamebook written by Jackson.  It is the 24th in the series in the original Puffin series (ISBN  ) and 4th in the modern Wizard series (ISBN  ). Keith Baker (born July 7, 1969) is a game designer and fantasy novel author. Aaron Dale Allston (December 8, 1960 – February 27, 2014) was an American game designer and author of many science fiction books, notably "Star Wars" novels.  His works as a game designer include game supplements for role-playing games, several of which served to establish the basis for products and subsequent development of TSR's "Dungeons & Dragons" game setting Mystara.  His later works as a novelist include those of the "" series: "Wraith Squadron", "Iron Fist", "Solo Command", "Starfighters of Adumar", and "Mercy Kill".  He wrote two entries in the "New Jedi Order" series: "" and "".  Allston wrote three of the nine Legacy of the Force novels: "Betrayal", "Exile", and "Fury", and three of the nine Fate of the Jedi novels: "Outcast", "Backlash", and "Conviction". Allen Varney (born 1958) is an American writer and game designer.  Varney has produced numerous books, role-playing game supplements, technical manuals, articles, reviews, columns, and stories, as well as the fantasy novel "Cast of Fate" (TSR, 1996).  Since the 1990s, he has worked primarily in computer games. World of Warcraft: Tides of Darkness is a fantasy novel written by Aaron S. Rosenberg and published by Simon & Schuster Pocket Star Books, a division of Viacom.  The novel is based on Blizzard Entertainment's Warcraft universe, and is a novelization of the RTS PC game: (1995).  It was made available on August 28, 2007 . Uwe Rosenberg (born 27 March 1970) is a German game designer and the co-founder of Lookout Games.  He initially became known for his card game "Bohnanza", which was successful both in Germany and internationally.  He also designed "Agricola", a genre-changing game that dethroned "Puerto Rico" as the highest rated game on BoardGameGeek.com in September 2008 and stayed at the top of the rankings until March 2010. Aaron S. Rosenberg (born October 13, 1969) is an American novelist and game designer. Peter Soyer Beagle (born April 20, 1939) is an American novelist and screenwriter, especially fantasy fiction.  His best-known work is "The Last Unicorn" (1968), a fantasy novel he wrote in his twenties, which "Locus" subscribers voted the number five "All-Time Best Fantasy Novel" in 1987.  During the last twenty-five years he has won several literary awards including a World Fantasy Award for Life Achievement in 2011. Matt James (born 1981) is an American game designer and a decorated veteran of the United States Army.  As a game designer, James is best known for his online and print works for the "Dungeons & Dragons" fantasy role-playing game published by Wizards of the Coast, "Pathfinder" role-playing game by Paizo, and Privateer Press.  He has also designed game content for Wolfgang Baur's Kobold Press (formerly Open Design LLC).  In 2012 James won an ENnie Award for "" and has been nominated for several Origins Awards.  In 2014, James won an ENnie Award for "".
Answer: Beyond the Dark Portal