Sci-Fi Romance: 24 trope pairings readers ask for, each with the counted reader asks in this lane naming both tropes together and the counted trope-tagged titles carrying both. 1 are open gaps. Free, no sign-up.
| Pairing readers ask for | Reader asks in this lane | Titles carrying both | Verdict |
|---|---|---|---|
| Found Family + Paranormal Romance separately: 345 and 109 tagged titles | 390 | 36 | Open gap 10.8 asks per published title |
| Fish Out of Water + Found Family separately: 66 and 345 tagged titles | 247 | 28 | Thin on the shelf 8.8 asks per published title |
| Monster Romance + Paranormal Romance separately: 73 and 109 tagged titles | 221 | 26 | Thin on the shelf 8.5 asks per published title |
| Fated Mates + Protective Hero separately: 215 and 187 tagged titles | 317 | 39 | Thin on the shelf 8.1 asks per published title |
| Captive Romance + Forced Proximity separately: 41 and 758 tagged titles | 295 | 37 | Thin on the shelf 8.0 asks per published title |
| Fated Mates + Forced Proximity separately: 215 and 758 tagged titles | 969 | 142 | Thin on the shelf 6.8 asks per published title |
| Fated Mates + Paranormal Romance separately: 215 and 109 tagged titles | 574 | 85 | Thin on the shelf 6.8 asks per published title |
| Found Family + Slow Burn separately: 345 and 296 tagged titles | 779 | 124 | Thin on the shelf 6.3 asks per published title |
| Fated Mates + Found Family separately: 215 and 345 tagged titles | 567 | 91 | Thin on the shelf 6.2 asks per published title |
| Found Family + Protective Hero separately: 345 and 187 tagged titles | 317 | 64 | Thin on the shelf 5.0 asks per published title |
| Fish Out of Water + Forced Proximity separately: 66 and 758 tagged titles | 229 | 47 | Thin on the shelf 4.9 asks per published title |
| Fated Mates + Slow Burn separately: 215 and 296 tagged titles | 312 | 65 | Thin on the shelf 4.8 asks per published title |
| Forced Proximity + Found Family separately: 758 and 345 tagged titles | 1,009 | 236 | Thin on the shelf 4.3 asks per published title |
| Fated Mates + Monster Romance separately: 215 and 73 tagged titles | 198 | 47 | Thin on the shelf 4.2 asks per published title |
| Forced Proximity + Paranormal Romance separately: 758 and 109 tagged titles | 268 | 68 | Thin on the shelf 3.9 asks per published title |
| Forced Proximity + Slow Burn separately: 758 and 296 tagged titles | 833 | 241 | Thin on the shelf 3.5 asks per published title |
| Enemies to Lovers + Slow Burn separately: 383 and 296 tagged titles | 326 | 120 | Well served 2.7 asks per published title |
| Forced Proximity + Protective Hero separately: 758 and 187 tagged titles | 318 | 150 | Well served 2.1 asks per published title |
| Found Family + Second Chance separately: 345 and 309 tagged titles | 219 | 105 | Well served 2.1 asks per published title |
| Enemies to Lovers + Found Family separately: 383 and 345 tagged titles | 218 | 119 | Well served 1.8 asks per published title |
| Enemies to Lovers + Forced Proximity separately: 383 and 758 tagged titles | 526 | 316 | Well served 1.7 asks per published title |
| Forced Proximity + Marriage of Convenience separately: 758 and 179 tagged titles | 249 | 155 | Well served 1.6 asks per published title |
| Forced Proximity + Grumpy MMC separately: 758 and 181 tagged titles | 192 | 153 | Well served 1.3 asks per published title |
| Forced Proximity + Second Chance separately: 758 and 309 tagged titles | 202 | 232 | Well served 0.9 asks per published title |
Reader asks is a counted number: parsed reader requests — from Goodreads and Amazon reviews and Q&A, Reddit and BookTok — in which a reader writing about this lane named both tropes in the same request. 1,972,935 reader signals sit behind it. Titles carrying both is counted the same way over published titles tagged trope by trope: 22,102 distinct titles, 163,929 trope tags. Neither number is modelled, sampled or estimated.
Two things to be straight about. The supply count is registry-wide, not lane-scoped — our demand data and our title tagging use different subgenre vocabularies, and rather than fake a join we count titles carrying both tropes anywhere in the tagged registry. And a pairing is only listed when both of its tropes carry at least five tagged titles on their own (the two figures are printed under each pairing), so a zero in the “carrying both” column means the pairing really is unwritten in what we have tagged, not that we simply never tagged the trope.
The verdict column is a rule, printed here so you can apply it yourself: ten or more asks per published title is an open gap; three to ten is thin on the shelf; below three is well served; and a pairing readers ask for that no tagged title in the lane carries at all is called out as such. Pairings with fewer than three asks are not listed — too few to mean anything.
What it is not. It is not a sales forecast and it is not advice to write anything. A gap can be a gap because readers ask and nobody delivers, or because the pairing does not work. That judgement is yours; the counting is ours. Counted 2026-08-26 and restated whenever the corpus is recounted — the raw JSON behind any lane is one query string away.
Free to embed on any blog, newsletter template or author site. The widget renders the pairing board for this lane and must keep its visible “Data: Tropesmith” credit link — that link back to tropesmith.com is the licence, and it is written into the payload server-side so it cannot be shipped without it.
<div id="tropesmith-trope-pairs"></div> <script src="https://tropesmith.com/embed/trope-pairs.js?lane=romance.scifi" async></script>
Prefer an iframe? <iframe src="https://tropesmith.com/embed/trope-pairs?lane=romance.scifi" width="100%" height="440" style="border:0" loading="lazy" title="Tropesmith trope pairings"></iframe>