For most new authors in 2026, romance (including romantasy) and other series-friendly commercial fiction, such as thrillers and cozy mysteries, offer the largest and most loyal reading audiences, while science fiction is the fastest-growing fiction category from a smaller base. Romance sold almost 44 million US print units in 2025, according to Circana BookScan. Still, the right genre for you is one you read and enjoy, because readers can tell, and a long series is far easier to write in a genre you love.
Here is what the latest data says, genre by genre, and how to use it without chasing trends.
Circana BookScan tracks US print book sales at reporting retailers. Publishers Weekly's report on the full 2025 year showed:
Total print units: 762.4 million, the second year in a row of growth
Adult fiction: up 1%, after a nearly 5% rise in 2024
Romance: up 3.9%, to almost 44 million units
Fantasy: down 8.7%, to 24.1 million units
Science fiction: up 22.1%, the largest increase among adult fiction categories, to just over 6 million units
Graphic novels: up 9.2%, to 25.9 million units
Self-help: up 14.7%, led by Mel Robbins's The Let Them Theory, which sold more than 2.8 million copies, more than any other print book in 2025 at BookScan outlets
Biographies, autobiographies, and memoirs: down 7%
Business and economics: down 3.9%
The market in 2026 has been mostly flat overall, with fiction doing the heavy lifting.
In the first half of 2026, total print unit sales slipped 0.3%, while adult fiction rose 5.7%.
Through October 3, 2026, total unit sales were down just 0.1%, to 531.3 million.
Young adult fiction is struggling, down 20.7% through the first nine months, with YA science fiction and fantasy down 30%.
Big names still drive spikes. Rebecca Yarros's Threshing Day sold nearly 858,000 print copies in its first week.
BookScan counts print books only. It does not include ebooks, audiobooks, or Kindle Unlimited reads, which is where many self-published authors earn most of their income. So pair print data with indie author surveys before you decide.
Romance is the largest and steadiest fiction category. In June 2025, Circana reported that romance print sales had more than doubled compared with four years earlier, with 51 million units sold in the prior 12 months. It named romantasy and sports romance as the fastest-growing romance subjects, each with triple-digit growth.
Circana also found that 26% of romance book buyers said they were reading "much more" than a year earlier. That kind of reader devotion is why romance suits new authors who can write quickly and in series.
One caution: the romantasy boom is cooling in print. Fantasy fell 8.7% in 2025, and Publishers Weekly described romantasy sales as cooling by mid-2025. Romance overall stayed strong, so romance with clear tropes may be a steadier bet than a pure romantasy trend play.
Thrillers have loyal readers who often binge a series. Circana's mid-2025 report showed psychological thrillers up 29%, and Circana analyst Brenna Connor described "a shift away from rosier romance subjects like romantic comedy and new adult romance in favor of authors and titles with darker themes."
Cozy mysteries are a quiet strength for indie authors. Written Word Media's 2025 Indie Author Survey found that cozy mystery authors appear more often in every income bracket above $500 a month.
Cozy fantasy, meaning low-stakes, warm, comforting fantasy, is a popular reader trend on social media. We could not find reliable sales figures for cozy fantasy on its own, so treat it as a promising niche rather than a measured category.
Science fiction posted the largest gain among adult fiction categories in 2025, up 22.1%, though from a smaller base than romance. At the American Booksellers Association's Winter Institute 2026, Circana analyst Brenna Connor forecast that readers will seek more genre mashups and supplement their romantasy reading with science fiction.
Circana's mid-2025 data showed dark fantasy up 23% and horror up 13%. These are smaller categories, but they reward authors who love building dread and atmosphere.
Self-help grew 14.7% in 2025, but much of that came from one huge title. Adult nonfiction was weak in early 2026. Nonfiction works well when you have real knowledge, a clear reader problem to solve, and a way to reach those readers, such as a business, a speaking career, or an online audience.
YA fiction fell sharply in 2026 print data. That does not mean you cannot write YA, but it is a harder starting point right now.
Written Word Media's 2025 Indie Author Survey asked mostly commercial fiction authors about income, catalog size, and marketing. All income data is self-reported. Key findings for genre choice:
Romance was the primary genre for 21% of respondents (276 authors), and fantasy for 14% (186 authors).
Paranormal romance showed one of the strongest links to high income: it made up 4% of all respondents but about 11% of authors earning over $10,000 a month, about 2.5 times its expected share.
Romance, paranormal romance, and cozy mystery were all over-represented in higher income brackets.
The pattern: commercial genre fiction with loyal, fast readers gives indie authors the clearest path to steady income, especially with a series.
Publishers Weekly noted that BookTok helped make adult fiction the strongest print segment after the pandemic. On BookTok, readers often search by mood and trope, such as "enemies to lovers," "found family," or "small-town romance," rather than by broad genre.
For new authors, that means:
Clear tropes help readers find you.
A strong emotional hook matters as much as the plot.
Trends can rise and fall quickly, so build on reader tastes that last.
Data can guide you, but it cannot choose for you. Ask yourself these questions:
What do I love to read? You will write many books in your genre. Pick one you enjoy.
Can I write a series? Series drive repeat sales in romance, mystery, thrillers, and fantasy.
How fast can I write? Fast-reading genres, like romance, reward frequent releases.
Do I know the reader expectations? Every genre has rules. Romance needs a happy ending. Cozy mysteries avoid graphic violence.
Is there a gap I can fill? A specific subgenre, setting, or character type that readers want more of can help you stand out.
Writing, editing, and publishing a book can take a year or more. A trend that is hot today may cool by the time your book is ready, as the 2025 fantasy dip shows. A wiser approach is to choose a lasting genre you love and add a fresh twist that fits current tastes.
Indie author surveys point to romance, paranormal romance, and cozy mystery as the genres most linked with higher incomes. Income still varies widely and depends heavily on how many books you publish and how you market them.
Romance overall remains strong, but print fantasy fell 8.7% in 2025 and romantasy cooled from its peak. It still has many readers, though it is more crowded than before.
Nonfiction can work if you have real knowledge and a way to reach readers. Self-help grew in 2025, but much of that came from one huge title, and adult nonfiction was weak in early 2026.
Yes. Many authors use separate pen names for very different genres so readers know what to expect.
It is harder right now. YA fiction print sales fell 20.7% in the first nine months of 2026.
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