I know this is an arbitrary metric, but if we count all books or stories officially published as part of an SFF universe, (even one with multiple authors and/or subseries), which would result in the largest combined word count?

  • 1
    Would you consider novelisations of a movie series or tv series? Or are you specifically looking for written, non-adaptive works?
    – fez
    Sep 12, 2021 at 19:28
  • 2
    @NKCampbell - A fanfic wouldn't count as part of the official universe it's set in, but a stand-alone online self published universe would be okay.
    – ibid
    Sep 12, 2021 at 20:45
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    VTC: The lack of guidance about language in this question makes it unanswerable (e.g., German smooshes what would be English phrases together into single words, languages with radically different orthographies—e.g., Chinese vs English, etc.) make this question an exercise in comparing apples to starfish to transit systems.
    – Lexible
    Sep 12, 2021 at 21:33
  • 1
    Does this include comic books/graphic novels, or just prose novels? Marvel/DC comics obviously aren't as wordy as novels, but might make up for it in sheer volume.
    – Milo P
    Sep 13, 2021 at 16:18
  • 3
    A whole lot of suggestions have been moved to chat. People, please consider posting more answers! Some verifiable data on word counts for serious contenders will be really helpful to appear in answers. There's only one answer so far, and even the answerer isn't sure that it's the longest, just one serious contender.
    – Rand al'Thor
    Sep 13, 2021 at 16:27

6 Answers 6


Star Wars - 129(ish) million

This includes 79 million in adult novels and novelisations (split into 70 million in Legends / 9 million in Canon) plus 50 million from in-universe factbooks. Taking into account about three hundred or so missing 'junior readers' (which I've estimated to have around 500 words each) and just over 2500 comics published (which I've estimated to have about 200 words each), that brings us to a rough total of around 129 million words written in-universe. Note that there are also at least 20-30 million words written out-of-universe (e.g. guides, encyclopedias, etc)

Other fictional universes that are decent contenders include;

  • Star Trek - 18.5 million
    This includes 17.3 million words of fiction, 500,000 words of in-universe factbooks and more than a thousand comics, counted in the same way as above.

  • Xanth - 4.2 million

  • Discworld - 3.8 million

  • Dune - 3 million

  • The Culture - 1.8 million

  • Babylon 5 - 1.2 million


My libraries for the 'universes' above are reasonably comprehensive.

I've used a simple word counting tool on them to estimate the count for each book, then totalised them. I've subtracted 2% for the legalese found at the start of each novel. Note that these scores are going to be inaccurate (although hopefully not wildly inaccurate) for a host of reasons including accidental dupes, missing books, book promos, etc.

  • 1
    I'm not a reader of Star Wars comics, but most of the comics I have read (Marvel, X-Men and New Mutants, most of 40 years ago) would run more like 2000 words per issue than 200.
    – Zeiss Ikon
    Sep 14, 2021 at 17:32
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    @ZeissIkon - I opened about thirty (from various eras) and averaged them. Most of the early ones have almost no dialogue other than caption boxes.
    – Valorum
    Sep 14, 2021 at 17:42
  • Hmm, okay. As I said, I've never read the Star Wars comics.
    – Zeiss Ikon
    Sep 14, 2021 at 18:12
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    Wow. To put things in perspective, how many words does The Lord of the Rings have? Sep 15, 2021 at 9:31
  • 4
    @Fabio Around 480,000, or 580,000 if you include The Hobbit too.
    – Rand al'Thor
    Sep 15, 2021 at 10:02

Perry Rhodan - 93 million (approximately)

Here is a press release regarding the 60 year anniversary of the German weekly pulp series Perry Rhodan: https://perry-rhodan.net/presse/zahlen-zum-gr%C3%B6%C3%9Ften-roman-kosmos-der-welt-einige-fakten-rings-um-60-jahre-perry-rhodan

They do not have a word count (which probably does not make sense in any case, since word lengths differ per language), but they estimate the character count for Perry Rhodan proper (the 3100 issues without paperbacks and spinoffs) at 558 million characters (however that seems to include whitespace).

The "Duden", the most used reference when it comes to German spelling and grammar, gives the average word length their own dictionary as about 6 letters if you includes articles (i.e. if they include explanatory text in the calculation of their word count) or some 14,5 if they count only the vocabulary itself. Perry Rhodan certainly uses a lot of articles and pronouns, so the first definition seems more pertinent. 558 million characters divided by six is 93 million words, which is impressive, but not notably more so than the Star Wars word count mentioned in the comments to the question. But there is more.

Their paperback series "PERRY RHODAN-Planetenromane" has an additional 400 issues (no character count given, IIRC they have about 150 pages, so about twice a regular issue).

They have also published paperbacks that are not part of the "Planetenromane". No exact number given.

They had a few spin-offs, most notably probably the Atlan series with some 850 60 page issues.

They mention that "The World of Perry Rhodan" so far has some 5000 "novels" ("Romane", their term for every publication that has at least the length of a regular issue, but might be longer - that includes everything above, i.e. weekly issues, paperbacks, special editions etc). I am not sure if the Perry Rhodan Neo series (a re-retelling of the original stories in a modernized form) is included (it is not mentioned by name in the press release, that would be some 300 issues).

They also have anthology editions that collect weekly issues in hardback format. Since at least the early issues have been heavily edited and condensed, you might count them as original content (but the press release does not).

So certainly a contender.

  • 14
    Also good god, this is terrifying. Does anyone actually keep up with this?
    – tardigrade
    Sep 12, 2021 at 20:31
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    @Valorum, frankly, at this point it would be enough to say that novels plus fact books have some 140 mio words or thereabouts. Since that is already more, it would be a better answer even without more detail. Sep 12, 2021 at 21:54
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    Arthur C. Clarke's story The Longest Science Fiction Story Ever Told has infinity words. [/smartarse]
    – Pete
    Sep 12, 2021 at 22:35
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    @TheSexyMenhir while this is true, as with any 60s publication, they also had kick-ass women (literally the first alien they meet is the female commander of a battle cruiser) and a diverse cast (especially in their team of mutant super-people that included Blacks, Japanese, Russian, German and alien members, both male and female). Bit like Star Trek, in that respect - diversity is there as an ideal, but the implementation in the stories is often lacking. Sep 13, 2021 at 7:55
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    @EikePierstorff Absolutely. I just feel that these kind of things should be mentioned whenever older works are recommended to a newer audience. Sep 13, 2021 at 8:38

It may not be as large as Star Wars but the Warhammer Universe comprises somewhat over 67 Mwords by my estimation. This is not as many as I expected, frankly, but I have tried to be conservative in my estimate, since I have no way to derive an exact count.

The details of my analysis follow.

The Warhammer Universe comprises Warhammer, Warhammer 40k, some smaller series, like Blood Bowl and Necromunda, plus the pan-universe periodicals Inferno and Hammer and Bolter. A count of the linked ISFDb page yields:

  • 584 novels
  • 163 anthologies and collections
  • 249 omnibuses
  • 1241 short works (up to novella length)
  • 19 "non-fiction" works (e.g. art books)
  • 72 periodical issues

In making my estimation I have included only the novels, anthologies, collections and periodicals. It is too difficult to estimate the word-count of the short works, since ISFDb only provides page-counts for publications as a whole, and the assumption is that most of the short works will appear in an anthology or collection. (see below) Likewise the assumption is that an omnibus will contain works already published as a novel or as a short work in a collection. The non-fiction we ignore since it is relatively insignificant anyway.

Since ISFDb only provides page counts we need to derive a word count from that somehow. Fortunately, this reddit post provide a total word-count of 5 383 300 for the first 47 Horus Heresy books, and ISFDb gives us a total page-count of 21 438 pages for the paperback versions of these. (5 383 300 / 21 438) = 251.11 words/page. (Which is close enough to the standard estimate of 250 words/page for a paperback to be worth a facepalm.)

Now we need to estimate the page count; I'm not going to visit all 747 books to add up the total pages in all the novels and collections. I did, however sum up the 85900 pages of the Warhammer universe, which divided by 245 books yields approximately 350 pages per book. The periodicals having 66 pages each, we get 747 * 350 + 72 * 66 = 266 202 pages, at 250 words/page is 66.55 million words. (It is not practical to continue anyway, since very shortly into the Warhammer 40k books we start encountering e-book-only anthologies which do not provide page-counts.)

Previously I made the assumption that all short fiction appeared in an anthology or collection, but that is not the case; sampling short fiction published since 2010, a great deal, close to half, is published only as stand-alone e-books or in e-book omnibuses. Thus rounding up to 67 million words is likely a very conservative estimate of the number of words in the Warhammer Universe.

  • 2
    There would also be extra count for all the background fluff in White dwarf and all the codex rule books, as they generally include plenty of in universe background that would count
    – mgh42
    Sep 14, 2021 at 23:59
  • Nice count. However, Warhammer 40k and Warhammer Fantasy are officially separate universes: scifi.stackexchange.com/questions/34166/…
    – Taladris
    Sep 15, 2021 at 9:48
  • @mgh42: +1. The background of many characters comes mostly from the rule books of their factions and many of them I believe never appeared in novels.
    – Taladris
    Sep 15, 2021 at 9:49
  • @dvaid what about the games? Imagine all the words in a single codebase. variables, file names, text for the user to read, subroutines, signing, EULAs, it goes on and on!
    – tuskiomi
    Sep 15, 2021 at 14:37

Extending Valorum's excellent answer, I'd put anything by David Weber above the word counts for Babylon 5 and The Culture, and probably Dune too.

Worse, they're almost all entirely written by a single author ...

  • Safehold series - 10 books, 2.75 million words
  • Honor Harrington - 14 books in the main series, 22 additional books listed. My collection is by no means complete, and comes to 7.5 million words

Are we including Fantasy?

  • Robert Jordan's The Wheel of Time: approximately 4.9 million words
  • 3
    If webfiction counts as published, Worm and its sequel Ward total 3.6 million words.
    – Sam Azon
    Sep 14, 2021 at 21:04
  • Add another 200k or so shortly... you inspired me to look, and we're getting a "post-war" book with the Crown of Slaves cast next month :)
    – hobbs
    Sep 15, 2021 at 0:09
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    That "single author" link is incredible.
    – ceejayoz
    Sep 15, 2021 at 14:30

To make it a bit less English-centric, I nominate 'La Compagnie des Glaces'. 97 novels, 200-ish pages each, totaling about 6 million words.

  • C'est trés grande.
    – Valorum
    Sep 15, 2021 at 18:02

Doctor Who books. Hundreds and hundreds of the things.


  • 2
    Care to work up a word-count from that? The Dr Who Universe page on ISFDb lists somewhere in the ballpark of 2500 works, but many of those are short stories, and the total isn't as much as the 3100 cited for Perry Rhodan above.
    – DavidW
    Jan 6, 2022 at 23:50

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