Find similar books by
Combine common axes
These books are ranked using the premise + setting labels extracted for Opal. Books rank higher when they are close on every selected axis.
Premise labels used: alien romance, hybrid identity, secret organization, rescue mission, dangerous alliance, protective partnership, truth discovery
Setting labels used: high school, contemporary earth, secret facility, underground labs, hybrid world, alien hidden world, government agency, urban fantasy setting
This does not mean the books share the same plot, setting, quality, or difficulty. It means their premise + setting embeddings are close.
Marco uncovers a hidden android ally, then joins a risky heist that forces brutal questions about war and pacifism.
Why this is here
Premise labels: alien infiltration · hidden ally · pacifism vs war · mystery ally · rescue mission · heist mission
Setting labels: Earth · contemporary setting · hidden underground world · school setting · secret alien presence · fictional science-fiction reality
Semantic match: ranked by premise + setting
Distance: 0.1281
A bonded teen alien romance spirals into secrets, jealousy, and government danger as hidden powers emerge.
Why this is here
Premise labels: alien connection · secret identity · government threat · hidden powers · new boy · forbidden attraction · trust issues · alien conflict · mystery unraveling
Setting labels: high school · small town · alien-in-human-world · contemporary setting · government intrusion · hidden paranormal world
Semantic match: ranked by premise + setting
Distance: 0.1452
A recovering psychic teen goes undercover at her old school to expose a spy, while secrets, lies, and love triangle chaos close in.
Why this is here
Premise labels: undercover mission · spy hunt · hidden traitor · psychic powers · trust issues · love triangle · war intrigue · secret agenda
Setting labels: school · academy · future dystopia · secret organization · government agency · compound · childhood home · undercover assignment · science-fantasy world · closed environment
Semantic match: ranked by premise + setting
Distance: 0.1751
Rachel infiltrates a controller’s home, uncovering dangerous truths while Earth’s teen resistance fights an alien invasion.
Why this is here
Premise labels: alien invasion · parasitic aliens · secret defense · morphing powers · infiltration mission · teen resistance
Setting labels: Earth · secret invasion · suburban home · school setting · fictional alien conflict
Semantic match: ranked by premise + setting
Distance: 0.1758
Kamala Khan is pulled into a prophesied off-world rescue mission that tests her family, identity, and future as Ms. Marvel.
Why this is here
Premise labels: alien invasion · chosen one · family in danger · planetary rescue · superhero identity · secret identity · cross-planet mission · destined protector
Setting labels: Jersey City · alien planet · space · interstellar · extraterrestrial world · high school life · comic-book reality · urban superhero setting · off-world adventure
Semantic match: ranked by premise + setting
Distance: 0.1775
![Cover of ダンダダン 4 [Dan Da Dan 4] by Yukinobu Tatsu](https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1647859570i/60045286.jpg)
A chaotic teen crew battles aliens and spirits while jealousy, romance, and a cursed house complicate everything.
Why this is here
Premise labels: alien invasion · supernatural battle · team-up quest · protective mission · romantic rivalry · haunted house · monster of the week · occult mystery
Setting labels: high school · modern day · school setting · haunted house · urban supernatural · alien-infested world · alternate spiritual reality
Semantic match: ranked by premise + setting
Distance: 0.1795
Daemon's side of the story deepens the romance, exposes hidden motives, and adds new scenes to a familiar sequel.
Why this is here
Premise labels: forbidden love · alien romance · secret identity · telepathic bond · protective hero · hidden powers · government threat · mystery return · truth seeking
Setting labels: contemporary Earth · alien-in-human-world · secretive community · government surveillance · science fiction reality
Semantic match: ranked by premise + setting
Distance: 0.1796
A lab-made operative must rescue and interrogate a tortured agent, but their mission turns into dangerous, forbidden desire.
Why this is here
Premise labels: rescue mission · forced intimacy · controlled operative · alien infection · undercover operative · forbidden attraction
Setting labels: future Earth · urban future · human-alien contact · secret government agency · alien-invaded world
Semantic match: ranked by premise + setting
Distance: 0.1800
Separated across worlds, Cara and Aelyx fight prejudice, politics, and threats that could derail human-alien peace.
Why this is here
Premise labels: alien exchange · long-distance romance · interplanetary alliance · culture clash · human colony · political tension · survival stakes · shared future
Setting labels: Earth · alien planet · spacefaring future · school setting · human colony · interplanetary society · off-world exchange · alien homeland · global contamination
Semantic match: ranked by premise + setting
Distance: 0.1824
A teenage human rebel survives an alien war, time jumps ahead, and becomes the mate of a warrior who finds her in the future.
Why this is here
Premise labels: alien invasion · human resistance · mates · time displacement · rescuer romance · survival · future rescue · enemy returns · human-alien pairing
Setting labels: Earth · New York City · subway tunnels · space · distant galaxy · undeveloped moon · future · alien world · confederation · military setting
Semantic match: ranked by premise + setting
Distance: 0.1828
A curvy soap-maker next door discovers her handsome neighbor is an undercover alien who wants her as his mate and mother.
Why this is here
Premise labels: alien mate hunt · forced proximity · kidnapping romance · hidden identity · next-door neighbors · pregnancy proposal · one-month deadline · earthbound alien
Setting labels: Earth · contemporary Earth setting · suburban neighborhood · single-home domestic setting · covert alien presence · secret-identity setting
Semantic match: ranked by premise + setting
Distance: 0.1845
A journalist infiltrates a secret military facility and falls into danger, desire, and a brutal alien-hybrid rescue.
Why this is here
Premise labels: secret experiment · genetic engineering · alien hybrid · super soldier · government cover-up · journalist investigator · captor romance · rescuer romance
Setting labels: future · Earth · top-secret facility · military base · secret lab · restricted area · science-fantasy reality
Semantic match: ranked by premise + setting
Distance: 0.1845
