Every 6 months, K-lytics publishes the closest thing indie publishing has to a census of science fiction and fantasy. The Summer 2026 edition is actually 3 reports: a genre-wide map of all 183 SF&F sub-categories, plus Top 100 Market Snapshots for both the Sci-Fi and Fantasy bestseller lists. We read all of it, roughly 180 pages of charts, so you don’t have to.
Quick methodology note, because Thomas will ask. K-lytics monitors the Top 100 and Top 20 bestsellers across more than 8,000 Amazon categories, observed over several days each month to smooth out rank spikes. The royalty figures are estimates modeled from sales rank, not pulled from anyone’s KDP dashboard, so treat the dollar amounts as directionally solid rather than gospel. The trends, however, come from 18 months to 7 years of continuous tracking.
Here is the state of the genre in 3 sentences. Fantasy just posted the strongest average sales rank K-lytics has ever recorded. Science fiction is 18 months into a genuine, broad-based rebound. And underneath both, the supply of competing titles grew 18% in a single year, which quietly rewrites the strategy for everyone.
Jonathan: If you’re not following K-lytics, and if you don’t purchase the reports that pertain to your genre and subgenre, you absolutely should. The sheer amount of data available to help you with your advertising, your promotion, your marketing strategy, and your content production strategy, whether that’s writing new books or making videos, is off the charts. You’re really doing yourself a disservice if you’re not spending $15 on the report that pertains to you.
We’re tracking trends here, not exact numbers.
The Big Picture: A Genre at Its Peak
Science Fiction & Fantasy is the number 4 genre in the entire Kindle store, behind only Romance, Literature & Fiction, and Mystery, Thriller & Suspense. The top 100 SF&F bestsellers average an estimated 277 sales per day per title.
The long-term chart shows the category at its highest-ever performance level, surpassing even the pandemic reading boom. But the 2 halves of the genre are living very different lives:
- The top 20 Fantasy titles average a sales rank of 40 in the entire Kindle store, moving an estimated 931 copies per day per title.
- The top 20 Science Fiction titles average a rank of 331 and roughly 237 copies per day.
That is nearly a 4 to 1 sales advantage for Fantasy, powered by Romantasy and, more recently, by LitRPG. K-lytics’ own trend chart annotation says it plainly: after 3 years of “Romantasy as a main driver,” the newest label reads “Dungeon Crawler adding to mix.”
Jonathan: I guarantee you those top 20 fantasy titles are romantasy.
Sci-Fi’s Comeback Is Real, and It’s Not Riding Hollywood
The genre report shows science fiction improving its relative rank position for 18 straight months, with the top 20 climbing from the 500 to 600 rank range in late 2024 to around 300 by June 2026. Alex Newton’s announcement highlights 2 underlying drivers:
- The 3-category upload limit is working. Since Amazon restricted books to 3 categories, “category pollution” (books miscategorized to farm bestseller flags) has steadily declined, so the sci-fi list increasingly reflects actual sci-fi demand.
- The upswing is broad-based. Unlike previous bumps driven by a single trend like Alien Romance, this recovery spans multiple sub-genres at once.
Add the demand-side evidence from the snapshot: Google search interest for “science fiction books” spiked in late 2025 to its highest indexed level in a decade, hitting 100 on Google Trends after bottoming near 20 in 2023 and 2024. Meanwhile searches for “science fiction movies” kept declining. The same crossover shows up on the fantasy side, where “fantasy books” overtook “fantasy movies” around 2022 and the gap keeps widening. Readers are going straight to the source, and the demand is book-native, which matters for ad targeting.
What the Lists Actually Pay
The 2 Top 100 snapshots put real dollar figures on the gap between the genres:
- Fantasy Top 100: an estimated 42,026 copies per day and roughly $4.47 million in author royalties per month. The #1 book moves about 2,375 copies daily, #20 moves 690, and even #100 sells around 131. Top 20 books average an estimated $113,066 per month. The worst performer on the entire list still clears about $3,221 per month.
- Sci-Fi Top 100: an estimated 12,554 copies per day and about $1.14 million in monthly royalties. The #1 book moves 1,034 copies daily, #20 moves 152, and #100 still sells 45. Top 20 books average $31,766 per month, and the floor of the list earns around $613.
Read those floors carefully. The bottom of the Fantasy list pays a mortgage. The bottom of the Sci-Fi list pays a car note. Both are achievable targets for a well-packaged indie series launch, and both beat what most traditionally published midlist authors see in a year.
The Playbook the Winners Are Running
Across both snapshots, the winning formula is remarkably consistent, with the dials set differently per genre.
- Kindle Unlimited: 78 of the top 100 Fantasy titles are in KU, capturing 83% of the list’s royalties, a share that grew in just 6 months. Sci-Fi splits 59/41, KU-leaning but not KU-mandatory. The wide minority in both genres is dominated by traditional publishers who can trade KU page reads for bookstore shelf space.
- Series: 89% of Fantasy bestsellers and 74% of Sci-Fi bestsellers belong to series, capturing 93% and 79% of royalties respectively. Standalones are swimming upstream in both genres.
- Length: the average Fantasy bestseller runs 537 pages; Sci-Fi averages 428. Readers buy immersion by the pound, and KU pays by the page. And quality floors are high: across the Fantasy list, 1-star and 2-star reviews average just 1.1% of ratings. Rapid release only works when the craft holds at 500 pages.
- Pricing, the two economies: Fantasy has split into 2 businesses sharing 1 list. The indie lane runs $4.99 to $6.99 in KU. The tradpub lane runs $11 to $17 backed by brand names and screen deals. Almost nothing wins at $7.99 to $8.99. The middle is dead. On the sci-fi side, $5.99 is the statistical sweet spot: 13% of list slots but 21% of royalties, with $6.99 punching even harder at 3% of slots and 12% of royalties. The bargain bin underperforms badly in both genres; $0.99 belongs to series starters with sequels ready, not flagships.
- Turnover: 77% of the Sci-Fi Top 100 and 51% of the Fantasy Top 100 was NOT on the list 6 months ago. Books published in March through June 2026 occupy 8 of Fantasy’s top 26 spots. These are not fortress lists defended by immortal backlist. New books break in constantly.
The Dinniman Story: A Self-Publisher Just Beat Sarah J. Maas
The single most remarkable data point across all 3 reports: the top-earning publisher on the June Fantasy list is not Bloomsbury or Entangled’s Red Tower. It is Dandy House, the personal imprint of Matt Dinniman, the LitRPG author behind Dungeon Crawler Carl.
- Dinniman has 8 books on the Fantasy list moving an estimated 8,700 combined copies and borrows per day, ahead of Red Tower at 4,643.
- Sarah J. Maas has 14 books charting, the most of any author, but her high-priced, non-KU Bloomsbury titles move a combined 2,688 copies per day.
- Dungeon Crawler Carl Book 1, published in October 2020, sits at #2 on the entire Fantasy list nearly 6 years later. His May release, A Parade of Horribles, tops the Sci-Fi list and sits at #9 in Fantasy simultaneously.
The business structure matters as much as the sales. Dinniman retains his ebook and audiobook rights and licensed print only, to Ace Books, starting in 2024. The series has reportedly sold well past 6 million copies, a Peacock TV adaptation from Seth MacFarlane is in production, and a tabletop RPG raised nearly $10 million this spring. He is the proof of concept for the hybrid model: keep the high-margin digital rights, rent out the print.
Jonathan: He retains his ebook and audiobook rights while moving 8,700 copies a day. I’m going to say that again, because it’s the whole ballgame. He is raking it in.
There’s another thing about the structure of the Dungeon Crawler Carl books. They’re long, which means a lot of KU page reads. Book nine just came out, and you know what that means. You have to go back and read the earlier ones again. Sometimes people want to listen to them too, because the narration is done so well. He’s scoring repeat sales and repeat revenue just based on the way he writes his books.
Bryan: I manage an Amazon Ads account for a LitRPG author. The series of his that sells best has nine books in it. His shortest book in that series is 550 pages and his longest is 850.
When I first took on his account, I thought this guy had to be writing with AI. He missed our first meeting, and when I emailed him, he apologized and said he had just written 17,000 words that day. He types all of it, and he uses a human editor. He says he’ll sometimes use AI for plotting. He’s a machine, and that’s a gift. He’s also a Marine.
I get to see his numbers through his Amazon Ads account. He does 80% of his sales as KU page reads. Long books, long series, page reads, and he is killing it.
The other thing this report gets right is that it’s not good enough to identify the place in the market where all the leaders are. A lot of times that subgenre is already saturated and you need to move on. With LitRPG, it isn’t. You find the demand-to-supply ratio, how many books are being released compared to how much demand there is for them, and LitRPG still sits in one of those sweet spots.
Jonathan: We’re not going to give all the data points away, because we don’t want to steal sales from Alex Newton. That would be a little bit like pirating.
The Overlooked Story: The Great Dilution
Now the number most coverage will miss. Competition in SF&F stands at approximately 1,162,272 English-language Kindle titles, up from 983,093 a year ago. That is 18% growth: roughly 179,000 new titles in 12 months, or about 490 new SF&F books arriving every single day.
Put that against the sales data. Demand at the top of the category is at record levels but trending sideways over the past 18 months. Supply grew 18%. The pie stopped growing while 179,000 more forks landed on the table. The average title’s share of the genre is mathematically shrinking even while the genre itself looks historically healthy.
K-lytics does not say where the surge comes from, but the timing lines up with the explosion of AI-assisted publishing. Whatever the cause, the consequence is the same, and the report states it directly: with this many titles, finding niches with high sales and low competition is no longer optional. It is the job.
The high turnover rates soften the blow. If 51% to 77% of the lists refresh every 6 months, the flood has not frozen the leaderboards. Velocity and positioning still break through. But the era when a decent book in a broad category could find its own audience is over.
Where the Money Is: The Niche Map
The genre report scores all 183 sub-markets by sales-to-competition ratio. Within the main SF&F category, only 12 of 64 sub-markets, about 19%, earn “hot” status:
- Cozy Fantasy is the single best opportunity in the entire report, with a 23.1 sales-to-competition ratio, nearly double the next niche: 60 daily sales per top-20 title against only 2,576 competing books. And the Top 100 snapshot confirms the demand is real and monetizing right now: a dragon-runs-a-diner novel at #36, The Tired Mercenary Just Wants to Farm in Peace at #37, and a cozy slice-of-life LitRPG at #91. On K-lytics’ new keyword scoring, “cozy fantasy” (45.9) now outranks “epic fantasy” (41.4).
- GameLit & LitRPG, filed under Literature & Fiction, posts a 14.8 ratio with top titles averaging a blistering 716 sales rank against just 8,620 competitors. Between the ratio data and Dinniman’s dominance, LitRPG is the most structurally undersupplied success story in the genre.
- Fantasy TV, Movie & Game Adaptations (14.3), Gaslamp (6.2), Androids, Robots & AI (5.1), Greek & Roman Myths (5.1), and Military Fantasy (5.0) round out the main-category hot list, with YA Dark Fantasy (6.1) and YA Epic (4.8) leading the cross-category opportunities at premium $9 to $10 price points.
- In the crowded “Hot Mainstream” tier, Fantasy-Romantic leads at 10.2, followed by Humorous Fantasy (5.3) and New Adult & College (4.6).
Jonathan: If you’re looking for the next opportunity in fantasy, cozy is where it’s at. There are only about 2,500 books competing in that category. If you can write funny, heartwarming stories, that’s where you want to be.
On the LitRPG side, have you ever seen somebody on a bicycle grab onto a truck and let it pull them down the road? You might want to do that with Dungeon Crawler Carl. When I finish a Dungeon Crawler Carl book, I’m looking for another one. If you write something similar, you may be what that reader chooses to continue the high they got from reading DCC. It’s a great strategy, and the best part is that you don’t even have to be that original to do it. It just has to be similar to what that person just read.
The 12-Month Winners and Losers
The trend data shows a clean realignment. Rising:
- Science Fiction-Adventure: up 49%, the biggest gain in the genre.
- LGBTQ+ Science Fiction: up 48%.
- Dystopian Sci-Fi: up 45%. The snapshot shows why: 7 totalitarian-warning classics chart in a single month, including Orwell twice and Atwood twice.
- Space Exploration: up 27%, plus Contemporary Fiction-Fantasy up 53% and Christian Fantasy up 36% in other category trees.
Falling:
- Science Fiction-Colonization: down 96%, the worst performer in the genre.
- Fantasy-Myths & Legends: down 90%, likely the end of the deconstruction-retelling wave.
- Military Sci-Fi-Space Marine: down 84%.
- YA Paranormal Vampires: down 106%, plus Sci-Fi Westerns down 61% and Sci-Fi Romance down 56% despite the latter still ranking high in absolute terms.
One trap worth naming: Norse & Viking Fantasy still scores as a hot niche (6.3 ratio) in the snapshot view, but its trend line has fallen 38% over 12 months. Attractive on paper, deteriorating in motion. Always check which way the line is moving before you commit a trilogy to it.
Jonathan: Dystopian is climbing because there are people who feel like the world is being destroyed. Sci-fi is really good at discussing that kind of thing and working it out, and people are interested in it.
I have a theory on why colonization is down. First of all, it has the wrong word. Colonizer does not have a good vibe in today’s climate. But colonization itself is also a fundamentally hopeful thing. When you go out into space and colonize a new world, that’s based on hope, and people aren’t feeling hope right now. They’re feeling civil war.
Bryan: If we’re in a fourth turning heading toward a first turning, the answer is noble dark. The world stinks, but I’m going to fix it. So why is colonization not a good performer right now?
Jonathan: Because colonization is first turning. And I may disagree with Thomas on this, or maybe we just haven’t fleshed it out in our discussions, but it’s never guaranteed that you get out of a fourth turning. It isn’t automatic that you move to a first turning. Good men must rise in the fourth turning to make the first turning come back. There have been so many attacks on creating good people, whether that’s simply having children or the things we’ll talk about in our next Zeitgeist segment. When you reduce the number of the good, eventually evil just wins, because there aren’t enough good people, barring divine intervention or something that drastically changes the power scales.
Bryan: If a fourth turning isn’t followed by a first turning, everything collapses. Look at Venezuela.
Jonathan: Venezuela fourth turned, and they’re devastated. It’s basically a wasteland. A lot of the damage was done before Maduro, and removing him might make us feel good, but I don’t feel like it solves a whole lot of their problems. They really need good people and good leaders to rebuild their society.
Colonization is based on hope. It’s a first turning concept. It does not surprise me that it’s down 96%.
Military sci-fi space marine down 84% is really surprising to me, because space marines are a fourth turning thing. Who do you want with you when the world is going down? Hey, that guy over there is a Marine. Stay out of his way, he’s crazy.
Bryan: It’s important to distinguish between the lengths of the cycles. Some of this is zeitgeist related, and it’s just cultural attitudes shifting. Those tend to be generational, so they’re 15 to 20 year cycles. Some of it is simply cyclical, because you get reader burnout, or too much supply. In commodities trading they always say the cure for high prices is high prices. When prices are high, producers rush to produce more and they fill the gap. That’s a natural supply and demand cycle, and those cycles are much shorter than the generational ones.
Deconstructionism is one of the aspects of postmodernism, and those eras are typically much longer than generations. The premodern era lasted 500 or 600 years. The modern era also lasted 500 years. Postmodernism was really born in the late 1800s with a bunch of French philosophers, but it didn’t hit pop culture until the 1950s and 1960s in the United States. So maybe it dies off with the boomers.
I’m not convinced postmodernism is on its way out yet. I still think it’s the underlay, and it’s a different underlay than the one beneath the last fourth turning. The last fourth turning was overlaid on a largely modern culture. This fourth turning is overlaid on a postmodern culture, with the rejection of truth and belonging before believing.
Jonathan: The thing being explored lately is the concept of civil war. Before, it was secession. Texas will leave the union. California will leave the union. It depends on who the president is as to who’s leaving the union. It’s not that anymore. Now it’s, we’re going to war, and we’re just going to fight over it.
That’s what happens when you overlay a fourth turning on postmodernism, because there’s no live and let live. That doesn’t exist anymore. It’s now, I’m going to find the ideology I hate and I’m going to destroy it.
Bryan: The last three fourth turnings were the Revolutionary War, then the Civil War 50 years later, then World War II 50 years later. Fourth turnings like to end in war, because they are creative destruction. You have to destroy the bad thing and build around it.
We might have an opportunity to get out of this a different way. We’re having a constitutional crisis right now. There’s an opportunity for constitutional amendments, which we’ve done several times in our history, though not anytime recently. The other option is a constitutional convention to rewrite the Constitution. You have to get a two-thirds majority of the states to call one, and a significant number of states have already signed up. That might be a peaceful resolution to the issue.
Jonathan: I personally don’t think we can generate that kind of unity anymore. These things can be filmed and broadcast, which means a lot of the people there aren’t there to work. They’re there to perform for their constituency, and it doesn’t matter what good they have to give up to do it. There won’t be any good faith effort to get the work done. I could be wrong, but based on my understanding of humans, I don’t think so.
Bryan: I agree the likelihood is very low. But all things originate with ideas, and authors drive ideas. A lot of it is the nonfiction authors writing on political and philosophical themes, and yet that’s not how those ideas get into pop culture. Most human beings don’t read philosophy. Nobody read Foucault. It came in through radio fiction and television fiction. People took those ideas, put them into stories, and that’s how they emerged in pop culture.
Fiction authors in particular have an opportunity to shape what’s coming next, because we can take those big ideas and illustrate them, showing how they might work out in a fictional context. That’s rich, and you can do it in historical fiction, sci-fi, or fantasy. Pick your genre.
The Keyword Minefield: 390 Flagged Terms
The bonus keyword sheets, over 1,000 scored terms across both genres, carry a compliance warning most authors will skip past. K-lytics flags 246 of 631 sci-fi keywords and 144 of 411 fantasy keywords as allowed in Amazon Ads but not recommended or not permitted in KDP’s 7 backend keyword fields. That includes obvious-looking terms like “fantasy books” (53.78 score), “fantasy series” (53.28), and “sci fi books” (48.79). Over a third of the highest-value search terms in both genres are metadata traps if you paste them into your backend slots.
Safe high scorers to build around instead: “fantasy litrpg” (49.45), “dark fantasy” (48.15), “cozy fantasy” (45.91), “scifi horror” (51.35), and “scifi romance” (50.33). And all 3 spellings of the genre name (“science fiction” 61.32, “sci fi” 60.64, “scifi” 57.83) score within a few points of each other, so cover every variant across your metadata.
The Survivorship Trap: Where Bestsellers Live Is Not Where You Should Move
Here is the mistake this data set practically invites you to make.
The Sci-Fi snapshot includes a table of the Kindle categories the Top 100 books are shelved in. The leaders are Military-Space Fleet (8 books), Post-Apocalyptic (8), Military-Space Marine (8), and Cyberpunk (7). The obvious conclusion is that those are the categories to target.
Now cross-reference the genre report, which measures those exact categories against their competition. Space Fleet: a 2.6 sales-to-competition ratio, classified Beaten Track Mainstream. Space Marine: a 1.7 ratio, Beaten Track Mainstream, and down 84% over 12 months. Post-Apocalyptic: 1.2. Cyberpunk: 1.5. Not one of them is a hot niche. Space Marine is one of the worst-performing categories in the entire genre.
Both facts are true at once. A category can host 8 bestsellers and still be a terrible place to launch a career, because the shelf count tells you where the winners ended up, not where a new book has room to breathe. It counts survivors. Meanwhile Cozy Fantasy, the single best opportunity in the genre report at a 23.1 ratio, places zero books on the Sci-Fi Top 100, because it is not a sci-fi category at all.
Read the 2 documents together and the lesson is sharp: the categories with the most bestsellers are usually the most contested. Shelf counts are a map of past victories. Sales-to-competition ratios and trend lines are a map of open ground. Only one of those helps you decide what to write next.
Two more cautions on reading the raw Sci-Fi list. Romance has colonized it, with roughly 15 to 20 of the Top 100 being sci-fi romance titles and LitRPG claiming another large block, so the “Science Fiction” list now measures 3 overlapping readerships. And a few shelf counts do corroborate the trend data rather than contradict it: LGBTQ+ Science Fiction places 5 books and GameLit & LitRPG places 4, both categories the genre report independently marks as rising or undersupplied.
What Authors Should Do With All This
- Sci-fi writers, come back. The 18-month rank trend, the Google search spike, and the cleaner post-category-limit data are the strongest demand signals the genre has shown since the pandemic. Aim at Adventure, Dystopian, and Space Exploration. Think twice before launching a colonization saga or space marine series into a 90-percent-class decline, no matter how many bestsellers are currently shelved there.
- Never pick a category off a bestseller shelf count. Cross-check every target against its sales-to-competition ratio and its 12-month trend. Popular categories are crowded categories.
- Fantasy writers, pick your lane. KU plus $4.99 to $6.99 plus a planned series is the indie playbook that captures 83% of the money. Wide plus premium pricing works only with tradpub muscle or a screen deal behind it.
- Price with confidence. Sci-fi’s sweet spot is $5.99. Fantasy’s indie lane tops out at $6.99, and epic fantasy readers pay $11 and up. The market absorbed 18 months of price increases without flinching.
- Write long, write series, keep the craft high. 428 to 537 pages, 5-plus book arcs, and a 1.1% bad-review floor is what the lists reward.
- Treat turnover as your opening. Half to three-quarters of these lists refresh every 6 months. Velocity breaks in.
- Above all, respect the dilution math. Flat demand plus 18% more supply means the average book earns less every month. The counter-move is not writing faster into broad categories. It is positioning into the Cozy, LitRPG, and YA Dark Fantasy gaps where demand still outruns supply, and building the author brand that survives a million-title flood.
Sources:
K-lytics: E-Book Market Research, Science Fiction & Fantasy, Premium Edition, June 2026
K-lytics: Science Fiction Top 100 Market Snapshot, June 2026
K-lytics: Fantasy Top 100 Market Snapshot, June 2026
K-lytics members area: SF&F 2026 Summer Edition seminar and bonus reports
Wikipedia: Dungeon Crawler Carl publishing history and rights structure
Jonathan: Don’t go where the bestsellers are. That ground is already taken. Go to open ground. Use the sales-to-competition ratios and the trend lines, see where the trend is going, and set up your beachhead there. Then you’ll be established when the tide of readers hits.
I was the same way when I started out in fantasy. I released In Darkness Cast at premium pricing and I tried to go wide. I’ve learned that if I want more books going out to more people, I’m in KU. That’s just how it has to be. I want to be wide and I want premium pricing, but that’s not the way this market works in fantasy right now.
Bryan: One caveat. I’m a publishing consultant, and I usually work with brand new authors publishing their first book. They’re already dealing with a learning curve. Craft of writing, editing, publishing, marketing, maybe audiobooks if they’re going that route. It takes time to get the infrastructure in place. Stay within the Amazon ecosphere until you have six to 10 books out and an established reader baseline, just for the sake of your learning curve.
The recommendation to be in KU, price well, and write in a series holds, unless it’s your first book. Please don’t make your first book the gateway to the rest of the series, because your first book had better be the worst book you ever wrote. People read it and go, “Eh, it was okay. Wasn’t bad.” They’re not going to read through books two, three, four, five, and six.
Get some standalones out there first, establish yourself in the genre, and don’t chase genre. If you’re a cozy mystery writer and you start doing fantasy, you’re establishing a new pen name.
Jonathan: You want to kill your series? Write a worse book than your first one.
