Guardians of the Flame
Guardians of the Flame is a long-running portal fantasy series by author Joel Rosenberg, and is arguably his best-known work. Begun in 1983, the series is about a group of college students who participate in a fantasy role-playing game, and are magically transported to the world of the game by their gamemaster. The first book, "The Sleeping Dragon", focuses on the former students struggling to survive in the world of the game. The series progresses with the students choosing to live in the 'game world' and forming their own community, which is in  part based on opposition to the ubiquitous slave trade. The series then expands upon the students' "Home" in the fantasy realm and their effecting societal change. In the later books, the focus shifts from efforts to destroy the slave trade and on to various characters dealing with the changes in the fantasy world wrought by the former students (now mostly 40-somethings). The final three books shift focus to a new set of protagonists, relegating the 'Other Siders' to supporting cast and cameo appearances. Novels. There are ten novels in the Guardians of the Flame series: The first seven novels  also have been reprinted in three omnibus editions collecting books 1–3, 4–5, and 6–7. The Science Fiction Book Club's omnibus editions of the first five books are titled "Guardians of the Flame: The Warriors" (Books 1–3, 1985) and "Guardians of the Flame: The Heroes" (Books 4–5, 1989). The Baen Books omnibus editions are titled "The Guardians of the Flame" (Books 1–3, 2003), "Guardians of the Flame: Legacy" (Books 4–5, 2004), and "Guardians of the Flame: To Home and Ehvenor" (Books 6–7, 2004). The Flame. Repeated references to the Flame are made in both the series title and at the  end of many of the books. The Flame is the flame of freedom, as explicitly stated in most of the book endings, and the students act as the guardians of the concept that slavery is evil. Thus, they are the Guardians of the Flame.