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The Encyclopedia of Science Fiction

English language reference work

  • 10 min read
  • 4 chapters

Related on Lably

Through Cross-reference and Hyperlink

The encyclopedia has appeared in four major editions. The first edition was published in 1979, followed by a substantially expanded second edition in 1993 and a CD-ROM version in 1995. A third edition was launched online in 2011 under the editorship of Clute, David Langford, Nicholls, and Graham Sleight, transforming the work into a continuously updated digital resource. Following a change of web host, a fourth edition was released in 2021. Since its first edition, the encyclopedia has grown from approximately 2,800 to more than 20,000 entries, with its online version totaling over seven million words.

The Encyclopedia of Science Fiction has received positive responses from critics, who have praised its breadth and usefulness as a reference work since its inception. It has won multiple major genre awards, including the Hugo Award, Locus Award, and BSFA Award, and has been credited with helping to establish standards for science-fiction scholarship.

Contents

The Encyclopedia of Science Fiction contains entries under the categories of themes, terminology, science fiction in various countries, films, television, magazines, fanzines, comics, original anthologies, awards, and miscellaneous, as well as people (authors, filmmakers, illustrators, publishers, and others). The encyclopedia, however, does not include entries on individual books. Most releases include various multimedia content; the 4th edition, as of February 2026, had over 35,000 images (mostly book covers).

Early on, the editors decided that the encyclopedia would be organized as a single alphabetical sequence rather than divided into separate sections, with cross-references linking related topics throughout the work. This emphasis on internal linking remained a defining feature of later editions and became more fully realized via hyperlinks after the encyclopedia moved online in 2011.

The online edition of The Encyclopedia of Science Fiction was released in October 2011 with 12,230 entries, totaling 3,200,000 words. The editors predicted that it would contain 4,000,000 words upon completion of the first round of updates at the end of 2012; this figure was actually reached in January 2013, and 5,000,000 words in November 2015. Though the SFE is a composite work with a considerable number of contributors, the three main editors (Clute, Langford and Nicholls) have themselves written almost two-thirds of the 5.2 million words to date (as of September 2016). As of February 2026, the site contained 20,868 entries totalling 7,532,364 words.

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