Title: The World Before
Content:  The World Before is a science fiction  novel by British writer Karen Traviss, published in October 2005. It is the third book in the Wess'Har Series.
Title: Worldchanging (book)
Content:  The updated version was published April 1, 2011, called Worldchanging, Revised Edition: A User's Guide for the 21st Century ISBN: 978-0-8109-9746-2. Alex Steffen is the author, Bill McKibben wrote the Introduction, and Van Jones wrote the Foreword. Sagmeister Inc. was the designer.
Title: The World Below
Content:  The World Below is a science fiction novel by American writer S. Fowler Wright. It was first published in 1929 by Collins. The novel was originally intended as a trilogy, however, the third part was never written. The first part was originally published separately as The Amphibians by Merton Press in 1924. The second part was published separately by Galaxy Science Fiction Novels in 1951 and was also titled The Worlds Below.
Title: World Made by Hand
Content:  World Made by Hand is a dystopian novel by American author James Howard Kunstler, published in 2008. Set in the fictional town of Union Grove, New York, the novel follows a cast of characters as they navigate a world stripped of its modern comforts, ravaged by terrorism, epidemics, and the economic upheaval of peak oil, all of which are exacerbated by global warming. World Made by Hand is followed by three sequels in the series, The Witch of Hebron (2010), A History of the Future (2014) and The Harrows Of Spring (2016).
Title: Worlds (book)
Content:  Worlds is a collection of science fiction and fantasy short stories by Eric Flint. It was first published in hardcover and ebook format by Baen Books on February 1, 2009; a paperback edition was issued by the same publisher in October 2011. The collection consists of ten short works of fiction, together with a preface, introductory notes introducing the individual stories and a bibliography of the author's works.
Title: The World Jones Made
Content:  The World Jones Made is a 1956 science fiction novel by American writer Philip K. Dick, examining notions of precognition, humanity, and politics. It was first published by Ace Books as one half of Ace Double D-150, bound dos-à-dos with Agent of the Unknown by Margaret St. Clair.
Title: Worlds Beyond (role-playing game)
Content:  Worlds Beyond was designed by Frank S. Shewmake with Steve Douglas, Douglas Laedtke, John Damon Lavette, Leigh Skilling, and Gary Warth, with a cover by Frank Lurz, and published by Other World Games in 1990 as a 160-page book. It was re-published as a classic reprint in 2021 by Precis Intermedia.
Title: Worlds (book)
Content: "Preface" "Author's Note" ; "Islands" (from The Warmasters, May 2002) "Author's Note" ; "The Wallenstein Gambit" (from Ring of Fire, January 2004) "Portraits" (from The Grantville Gazette, Oct. 2003) ; "Steps in the Dance" (from Grantville Gazette II, March 2006) ; "Postage Due" (from Grantville Gazette III, January 2007) "Author's Note" ; "From the Highlands" (from Changer of Worlds, March 2001) "Author's Note" ; "Entropy, and the Strangler" (from L. Ron Hubbard Presents Writers of the Future, Volume IX, October 1993) ; "The Realm of Words" (from Jim Baen's Universe, June 2007) "Author's Note" ; "Genie Out of the Bottle" (with Dave Freer) (from Cosmic Tales II: Adventures in Far Futures, February 2005) "Author's Note" ; "Carthago Delenda Est" (from Foreign Legions, June 2001) ; "Appendix: Eric Flint Bibliography"  The Belisarius series The 1632 series The Anne Jefferson stories The Honor Harrington series The Joe's World series The Rats, Bats & Vats series The Ranks of Bronze series
Title: The World Without US
Content: Niall Ferguson, PhD. ; James Lilley ; Saad Al-Ajmi, PhD. ; Cheol-Hwan Khang ; Hideyoshi Kase, PhD. ; Legislator Bi-Khim Hsiao ; General Jovan Divjak ; Miljenko Dereta 
Title: World Brain
Content: New edition with a foreword by Bruce Sterling and introduction by Joseph M. Reagle Jr. (front matter and introduction). New edition with a foreword by Bruce Sterling and introduction by Joseph M. Reagle Jr. (front matter and introduction). New edition with a foreword by Bruce Sterling and introduction by Joseph M. Reagle Jr. (front matter and introduction). 

Question: Who is the author of The World Before?
Answer: Karen Traviss.