"Romance" covers about a dozen genuinely different reading experiences, and the labels are not always intuitive — romantasy and paranormal are not the same thing, dark romance is a tone rather than a setting, and "spicy" describes a heat level rather than a subgenre at all. Here is the whole taxonomy, what each one actually means, and roughly how much of it exists.
How the categories actually divide
Two axes, not one. The first is setting and premise — contemporary, historical, fantasy, paranormal, suspense. That is what most people mean by subgenre. The second is tone and heat — dark, cosy, sweet, explicit — which cuts across all of them. A dark historical and a dark romantasy have more in common with each other than either has with a sweet book in the same setting.
That is why filtering by one category alone rarely gets you what you want. Contemporary is nine thousand books; contemporary plus a trope plus a heat level is a shelf.
By setting and premise
Contemporary
Present day, real world, no magic. The default setting and by far the largest category — which makes it the least useful filter on its own. Everything from small-town comfort reads to billionaire romance to college sports lives here. Useful only in combination with something else.
Rom-Com
Contemporary with comedy as the primary register: banter-heavy, fast, usually lower angst and a guaranteed soft landing. The distinction from general contemporary is tonal rather than structural. If you want to laugh rather than cry, this is the filter.
Historical
Anything set before roughly the mid-twentieth century. In practice it is dominated by Regency and Victorian England — Bridgerton country — with a smaller Scottish-highlands and American-West contingent. Distinct conventions: courtship rules, class stakes, and a marriage plot with real consequences.
Romantasy
Fantasy world, romance plot, and the romance is the point rather than a subplot. The newest label on this list and the fastest-growing. The tag is applied conservatively here — a lot of books that read as romantasy are catalogued under Fantasy, so use both.
Fantasy
The wider fantasy-romance shelf, including books that predate the romantasy label. If Romantasy feels thin, this is where the rest of it is. Overlaps heavily with Dark and with Paranormal.
Paranormal
Vampires, shifters, witches, fae — supernatural beings in a world that is otherwise recognisably ours. The distinction from romantasy is the setting: paranormal is usually contemporary earth with monsters in it, romantasy is a secondary world. Long-running series are the norm.
Romantic Suspense
A thriller plot and a romance plot running together, with the danger external — a stalker, a case, a conspiracy. Distinct from dark romance, where the danger is usually the love interest. Heavy overlap with Military and with Suspense.
Sports
Athletes, teams and the season structure that comes with them. Hockey dominates to the point of being its own subgenre; American football, soccer and figure skating make up most of the rest. Almost always dual-POV, which is why it works so well on audio.
Western
Ranches, rodeo circuits and small towns in the American West. Currently in the middle of a revival driven by Elsie Silver and the streaming-Western boom. Tonally closer to small-town contemporary than to historical, despite the setting.
Military
Service members, deployment, and the particular separations and stakes that come with them. Overlaps strongly with Romantic Suspense. Rebecca Yarros wrote in this space long before Fourth Wing.
By tone and heat
These cut across every setting above. A book can be contemporary and dark, or historical and dark, and the tone tag tells you more about the reading experience than the setting does.
Dark
Morally grey or outright villainous love interests, coercion, violence, and content that requires warnings. It is a tone, not a setting — there is dark contemporary, dark mafia, dark romantasy. The single most important thing to know: check the content warnings first, because the range within this tag is enormous.
Erotica
Where the explicit content is the primary draw rather than a component. Distinct from "spicy", which describes heat level within a normal romance structure. Most of what BookTok calls spicy is catalogued under its setting with a high heat level, not here.
New Adult
Late teens to mid-twenties — college, first jobs, first serious relationships. Higher heat than young adult, lower stakes than full adult contemporary. Most college sports romance sits here.
LGBTQ+
Queer romance across every setting above. Growing quickly, and some of the strongest writing in sports romance in particular is M/M. Filter it alongside a setting rather than on its own.
Cosy
Low heat, low stakes, high comfort — often with a mystery, a bookshop or a bakery attached. A small tag here but a growing part of the market, and the natural landing place for readers who want romance without the spice.
The two filters that matter most
Once you know your subgenre, the two things that will actually narrow it usefully are heat level and trope.
Heat is the one people get wrong most often, because "spicy" means different things to different readers and the marketing copy is unreliable. The catalogue browser filters it directly, which is more honest than a blurb.
Trope is the more powerful filter. Enemies-to-lovers, fake dating, grumpy-sunshine, second chance, forced proximity — these describe the shape of the story, and readers are usually far more loyal to a trope than to a subgenre. Our tropes explained guide defines the ones worth knowing, and stacking two of them against a subgenre is the single most effective way to find your next book.
Where to start
If you are new to the genre entirely, our guide to what a romance novel is covers the conventions — including the one rule the genre actually enforces. If you know your subgenre and want the shortlist, each section above links to a best-of guide. And if you would rather browse, the catalogue filters all of this at once.