Romance is the biggest fiction genre in publishing. It sells more than thrillers, more than sci-fi, more than literary fiction — and by a wide margin. Yet there's still confusion about what actually makes a book a romance novel versus a book that simply has romance in it. The answer comes down to two rules, and the rules aren't mine — they're the ones the Romance Writers of America have used for decades.
The Two Rules of Romance
Rule one: a central love story. The relationship between the main characters has to be the engine of the plot. If you stripped the romance out, the book would collapse. That's the test. A literary novel that happens to include a love story isn't a romance. A thriller with a romantic subplot isn't a romance. A book where the central question is "will these two people end up together" — that's a romance.
Rule two: an emotionally satisfying ending. Romance novels end with the couple together (a Happily Ever After, or HEA) or on a clear path toward being together (a Happy For Now, or HFN). A book where the protagonists end up apart isn't a romance — it's a tragedy. The genre's commercial success is built on the promise that the reader is safe. The tension comes from how the couple gets there, not whether they do.
Everything else is negotiable. The setting can be a Regency ballroom or a hockey arena or a fae court with dragons. The heat level can be sweet kisses or explicit on-page sex. The leads can be sworn enemies, exes, strangers, or best friends. As long as those two rules hold, it's a romance.
The Main Subgenres
Contemporary romance is set in the present day and deals with the relationships of ordinary life — workplace romance, small-town love stories, rom-coms, single parents, second chances. Authors like Emily Henry, Abby Jimenez, and Tessa Bailey dominate this space.
Historical romance lives mostly in Regency England (thanks to Julia Quinn's Bridgerton) but extends to Victorian, Edwardian, and Scottish Highland settings. Expect dukes, balls, scandals and social rules that create the central obstacle.
Romantasy (fantasy romance) is the fastest-growing subgenre of the last three years. Books like Rebecca Yarros's Fourth Wing and Sarah J. Maas's A Court of Thorns and Roses build full fantasy worlds — magic systems, kingdoms, dragons, fae — around a central love story. If the fantasy and romance are equally weighted, it's romantasy.
Paranormal romance centers on supernatural beings — vampires, werewolves, shifters, witches, ghosts. Often features "fated mates" (the universe binds the couple together) and usually lives in a contemporary world with supernatural elements layered in.
Dark romance explores morally grey leads, obsession, power imbalance, and themes most mainstream romance avoids — dubious consent, violence, captivity, mafia. The HEA rule still applies, but the journey is harrowing. Authors like H.D. Carlton and Rina Kent define this space.
Sports romance — primarily hockey right now, thanks to Hannah Grace's Icebreaker, but also football, soccer and baseball. The athlete hero is the through-line.
Rom-com is romance played for laughs. The stakes are real but the tone is light. Emily Henry and Ali Hazelwood are the current genre leaders.
There are many more — romantic suspense, Christian romance, Amish romance, LGBTQ+ romance, YA romance, new adult/college romance, cowboy/western — and any combination of these can overlap.
Heat Levels
The single most useful thing to know about a romance before reading it is the heat level. There's no universal scale, but here's the one most readers use:
Clean / Christian: No physical intimacy on page. Closed-door if anything at all. Often includes faith elements.
Sweet: Kisses and maybe some build-up, but physical intimacy fades to black.
Steamy: Explicit scenes exist but aren't the main draw. Usually a few scenes per book.
Spicy: Frequent, explicit, detailed sex scenes. The physical relationship is part of the plot development.
Dark: Explicit scenes plus morally complex themes — power imbalance, dubious consent, taboo dynamics. Content warnings are important; readers should know what they're signing up for.
Tropes Are the Shorthand
Romance readers shop by trope more than by author, because tropes tell you exactly what emotional journey you're signing up for. The major ones:
Enemies-to-lovers: They hate each other. They have to work together. They fall in love. The slow-burn payoff is the draw.
Friends-to-lovers: They've known each other forever. One of them realizes it's more. The risk is losing the friendship.
Fake dating: They pretend to be together for a practical reason — family pressure, a work event, revenge on an ex. Feelings become real.
Grumpy-sunshine: One lead is closed off and cynical, the other warm and optimistic. Opposites attract.
Second chance: They were together before. Something broke them apart. Now they're back in each other's orbit.
Forbidden: Society, family, circumstance, or the rules say this relationship can't happen. They happen anyway.
Age gap: A significant age difference is the source of tension — sometimes internal, sometimes external.
Marriage of convenience: They marry for a practical reason. Real feelings catch them off guard.
Fated mates: In paranormal and romantasy, the universe has decided they belong together. The question is whether they'll accept it.
Secret baby: A past relationship resulted in a child the other parent doesn't know about. Reconnection follows the reveal.
The Structure Most Romances Follow
Most romance novels move through a recognizable arc: a meet-cute or meet-disaster that establishes the dynamic, a rising emotional connection as obstacles surface, a peak moment when the couple feels like they might actually make it, a "black moment" where all appears lost — sometimes due to a misunderstanding, sometimes a real conflict — and then a grand gesture or earned reconciliation that delivers the HEA. Most romance novels close with an epilogue set months or years in the future, giving readers the reassurance that the happy ending actually stuck.
This structure isn't a formula — it's a contract. Readers come to romance because they know roughly what they're going to get, and the author's job is to make the familiar beats feel fresh. The writers who do that are the ones who build careers.
Where to Start
If you're new to romance, pick a subgenre that sounds like something you'd normally watch or read. Love period drama? Start with Julia Quinn's Bridgerton series or a classic Lisa Kleypas historical. Fantasy fan? Try Rebecca Yarros's Fourth Wing or Sarah J. Maas's A Court of Thorns and Roses. Prefer something contemporary and character-driven? Emily Henry's Beach Read or Book Lovers. Want the BookTok phenomenon everyone's talking about? Ana Huang's Twisted series or Penelope Douglas's Punk 57. For spice with a fantasy backdrop, Jennifer L. Armentrout's From Blood and Ash.
Our filter tool on the browse page lets you narrow by subgenre, heat level, and trope simultaneously — so you can find, for example, a steamy enemies-to-lovers romantasy, or a clean small-town second-chance contemporary, in one step. That's the single biggest advantage romance has over other genres: readers know exactly what they want, and the genre delivers it.