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Built on ISFDB, Wikipedia, Wikidata and Open Library. Curated reading orders carry their reasoning on the page; the rest follow publication order. Data sources & licenses

© Loreful · data: ISFDB · CC BY

More like Invaders

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Mood

The mood the book leaves you in.

  • The reading experience is propelled by journeys, exploration, and physical risk; excitement and forward momentum dominate over dread or introspection.
  • Joy and loss are deliberately mixed; the resolution grants characters something real while taking something else away, leaving warmth and sorrow together.
  • The book demands work from the reader — dense prose, difficult structure, unfamiliar ideas, or morally uncomfortable material — as part of its intended effect.
  • Grim events, cruelty, or despair dominate the atmosphere, and the book does not soften them with comfort or comic relief.
  • The atmosphere is quietly unsettling — wrongness, unease, and the uncanny pervade the book without necessarily escalating into overt horror.
  • The book is built to move the reader; character feeling is foregrounded and major scenes aim at a strong emotional response.
  • Humor is a primary aim and the prose plays for laughs — comic situations, wit, or dialogue produce sustained comedy, not occasional levity.
  • The book insists that things can improve; effort and decency are shown to matter, and the arc bends toward better outcomes even through hardship.
  • The book teaches as it goes — real facts, history, science, or craft are conveyed in enough depth that learning is part of the reading experience.
  • The book is designed to uplift and motivate, presenting perseverance or achievement in a way that invites the reader to aspire or act.
  • The overall register is cheerful and easygoing; stakes are kept gentle and the book avoids dwelling on pain or dread.
  • Withheld information drives the experience; the book sustains enigmas and secrets the reader wants resolved, whatever its genre.
  • The book is contemplative and inward-looking, giving more weight to thought, memory, and meaning than to external events.
  • Grief, loss, or melancholy set the dominant register, and the book lets sorrow stand rather than resolving it into comfort.
  • Sustained suspense is the point; the book keeps the reader braced for what happens next through danger, pressure, or impending revelation.
  • Playful invention and charm define the register — fanciful conceits, light absurdity, and a narration that delights in its own oddity.

About

What the story runs on.

  • Stories in which a machine intelligence — an AI, computer mind, or sentient program — is a central character or the story's driving problem.
  • Stories in which extraterrestrial beings are central — as characters, cultures, or the object of the plot.
  • Stories about venturing into space to explore — survey missions, astronauts, and the frontier of the unknown beyond Earth.
  • Stories about settling other planets or habitats — founding, sustaining, and governing colonies off Earth.
  • Stories about minds with paranormal abilities — telepathy, telekinesis, precognition, empathy — and how societies handle those who have them.
  • Stories structured as a quest — a journey undertaken to find, deliver, or destroy something of great import.
  • Stories in which staying alive against nature, catastrophe, or scarcity is the central problem.
  • Stories in which a friendship — its making, testing, or loss — is the emotional center.
  • Stories of growing up — a young protagonist crossing from childhood into adult knowledge and responsibility.
  • Stories about who a character truly is — self-discovery, doubled lives, and the search for a self.
  • Stories driven by maneuvering for power — factions, conspiracies, and statecraft conducted in shadow.
  • Stories in which war itself is the subject — combat, occupation, and what warfare does to soldiers and civilians.

Shelf

Where it sits in the library.

    • Fiction built on magic or other supernatural elements that have no scientific explanation.
    • Secondary-world fantasy at large scale, where the fate of nations or the world turns on the protagonists' struggle.
    • Fantasy set in a recognizably modern city or contemporary world where the supernatural intrudes on everyday life.
    • Fantasy that blends in horror's atmosphere and imagery, keeping a fantastical frame around grim or frightening material.
    • Action-driven fantasy following warriors or rogues with personal stakes against sorcerous threats, rather than world-spanning conflicts.
    • Fantasy set in a real historical period or a close analogue of one, with magic woven into the era.
    • Fantasy in which protagonists cross from the ordinary world into another world through a portal or similar passage.
    • Fiction that retells or reworks a traditional fairy tale in a new form or setting.
    • Fantasy drawing directly on myths, legends, and folklore, retelling them or building on their figures and logic.
    • Fantasy of ghosts, vampires, shapeshifters, psychics, and similar phenomena, usually set in an otherwise ordinary world.
    • Fiction mixing science-fictional trappings with overtly magical or impossible elements in one setting.
    • Low-stakes fantasy emphasizing comfort, community, and everyday pleasures over conflict and peril.
    • Speculative fiction of pervasive moral ambiguity, violence, and cynicism that rejects heroic conventions — fantasy and SF alike.
      • Fiction that extrapolates from science and technology — future societies, space travel, or speculative inventions — within at least nominally natural laws.
      • Science fiction of interstellar scope — starships, galactic polities, and adventure across star systems.
      • Science fiction committed to scientific rigor, where technical plausibility constrains the story.
      • Science fiction centered on armed forces and warfare, told largely from a military point of view.
      • Science fiction of networked, corporate-dominated near futures, pairing high technology with social decay.
      • Science fiction styled on nineteenth-century steam-powered technology, often in a Victorian or pseudo-Victorian setting.
      • Fiction depicting an oppressive or catastrophic society, presented as a warning.
      • Fiction set after civilization's collapse, following survivors in the ruins of the old world.
      • Fiction in which characters move between past and future, and the mechanics or consequences of that travel drive the plot.
      • Fiction exploring a world where a historical event went differently and history diverged from ours.
      • Science fiction about humanity's first encounter and communication with an alien intelligence.
      • Science fiction in which extraterrestrial forces attack or occupy Earth and humanity resists.
      • Fiction whose primary aim is to frighten or unsettle the reader through dread, menace, or the monstrous.
      • Horror of vast, indifferent, incomprehensible entities before which humanity is insignificant, in the Lovecraft tradition.
      • Horror of decaying houses, buried family secrets, and oppressive atmosphere in the Gothic literary tradition.
      • Horror centered on hauntings and the returning dead.
      • Horror located in the mind — paranoia, obsession, and unreliable perception rather than external monsters.
      • Horror built around the reanimated dead and survival amid their outbreaks.
      • Horror defined by explicit, transgressive gore that refuses to cut away from violence.
      • Speculative fiction of the strange and uncanny that resists both natural explanation and standard genre categories.
      • Fiction organized around solving a crime or puzzle, typically following an investigator toward the identification of a culprit.
      • A puzzle-first mystery that lays out clues so the culprit's identity can be deduced before the reveal.
      • Crime fiction of moral ambiguity, fatalism, and hard-edged style, set among the corrupt and the doomed.
      • A mystery following the realistic routines of police work — forensics, interviews, and case-building.
      • A gentle mystery with an amateur sleuth, a small community, and violence kept off the page.
      • A mystery set in a past era, where the investigation works within that period's methods and society.
      • Fast-paced fiction driven by imminent danger, pursuit, or high-stakes conspiracy, built to sustain tension.
      • A thriller of espionage — agents, tradecraft, and intelligence services in conflict.
      • A thriller centered on lawyers and the courtroom, where litigation carries the suspense.
      • A thriller driven by detailed contemporary or near-future technology, often military or scientific.
      • A thriller whose tension comes from mental states and manipulation between characters rather than external action.
      • Fiction whose central plot is a romantic relationship and its development toward an emotionally satisfying resolution.
      • Romance in which one or both partners are supernatural beings, blending fantasy elements into the love story.
      • A fantasy-romance hybrid in which the romantic arc and the fantasy plot carry equal weight.
      • Romance set in a past era, with courtship shaped by the period's society and manners.
      • Romance set in the present day, without supernatural or historical elements.
      • Fiction set in a real past period, where the historical setting materially shapes characters and events.
        • General and literary fiction emphasizing prose style, character interiority, or formal ambition over genre plot conventions.
        • Fiction in a realistic world where magical events occur and are treated as ordinary, in the tradition of Latin American literature.
        • Fiction that ridicules people, institutions, or society in order to criticize them.
        • Fiction of dreamlike, irrational imagery and logic that breaks from realistic representation.
        • Fiction that plays with narrative convention through metafiction, fragmentation, and self-reference.
        • Fiction propelled by journeys, exploration, and physical peril, where action and survival carry the plot.
        • Adventure fiction of ships and seafaring — naval engagements, voyages, and life at sea.
        • Fiction of the American frontier West — gunmen, ranchers, and lawmen, typically in the late nineteenth century.
        • Fiction centered on soldiers, campaigns, and the experience of warfare, historical or imagined.
          • Fiction written primarily to amuse, using comedic situations, wit, or parody as its organizing principle.
            • Fiction whose world runs on explicit game mechanics — levels, stats, and skills that characters can see and exploit.
              • Fiction about costumed or superpowered heroes and their conflicts with comparable villains.

              Practical

              How long a commitment, whether it stands alone, and whether it has finished.

              Tap a chip to ask for it · tap again to rule it out · once more to clear. Numbers show what would be left.

              • Cover of Slaughterhouse-Five or the Children's Crusade: A Duty-Dance with Death
                Slaughterhouse-Five or the Children's Crusade: A Duty-Dance with Death

                Kurt Vonnegut & Jr. · standalone novel · 1969

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                Vonnegut opens in his own voice, describing the twenty years it took him to face writing about surviving the firebombing of Dresden as a POW. He then hands the story to Billy Pilgrim, an awkward, fatalistic American chaplain's assistant swept into the Battle of the Bulge and captured by German forces alongside a soldier who dies blaming him for it. Imprisoned in a disused slaughterhouse in Dresden, Billy survives the firebombing that follows, and, we're told upfront, has also come 'unstuck in time,' living his life out of order, including a stretch on the alien world of Tralfamadore. Vonnegut's best-known novel folds war memoir into science fiction and black comedy.

              • Cover of Shakespeare's Planet
                Shakespeare's Planet

                Clifford D. Simak · standalone novel · 1976

                similar byaliensfirst contact+1 more

                Woken after a thousand-year voyage meant to find humanity a new home, Carter Horton finds his ship stranded for good, tended by the disembodied minds of three volunteers who gave up their bodies to fly it. Outside waits a world already crowded with strangers: a robot named Nicodemus, and an alien called the Carnivore who claims to have known a human, once, called Shakespeare, and to have arrived here through a tunnel across time. As more travelers arrive through that same tunnel, Horton has to work out what kind of planet he has actually landed on. A standalone novel from Clifford D. Simak.

              • Cover of Stranger in a Strange Land
                Stranger in a Strange Land

                Robert A. Heinlein · standalone novel · 1961

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                Stranger in a Strange Land is a 1961 science fiction novel by the American author Robert A. Heinlein. It tells the story of Valentine Michael Smith, a human who comes to Earth in early adulthood after being born on the planet Mars and raised by Martians, and explores his interaction with and eventual transformation of Terran culture.

              • T
                Thistledown

                series · 5 books · 1978

                completed

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              • Cover of Childhood's End
                Childhood's End

                Arthur C. Clarke · standalone novel · 1953

                similar byaliensfirst contact

                Childhood's End is a 1953 science fiction novel by the British author Arthur C. Clarke. The story follows a peaceful alien invasion of Earth by mysterious Overlords, whose arrival begins decades of apparent utopia under indirect alien rule, at the cost of human identity and culture.

              • Cover of The Science Fiction Hall of Fame
                The Science Fiction Hall of Fame

                series · 11 books · 1895

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              • Cover of Moties
                Moties

                series · 4 books · 1974

                part of CoDominium

                similar byaliensfirst contact

                Larry Niven and Jerry Pournelle's The Mote in God's Eye (1974) depicts humanity's first contact with an alien species, the Moties, set within the far-future interstellar setting of Pournelle's codominium future history. The Gripping Hand continues that first-contact crisis years later, and Outies, written by J. R. Pournelle, carries the story forward into a new generation. Together the three books trace an escalating encounter between human and Motie civilizations within the codominium universe.

              • Cover of Cavor
                Cavor

                series · 2 books · 1901

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                H. G. Wells's 1901 novel The First Men in the Moon is narrated by the businessman Bedford, who joins the reclusive scientist Cavor after Cavor invents cavorite, a gravity-blocking substance that carries the two men to the Moon. There they discover a vast underground civilization of insect-like Selenites, and the expedition that began as a hunt for lunar minerals turns into an encounter with an alien society. It is a standalone novel; later editions crediting Stephen Baxter add an introduction or afterword rather than a continuing story.

              • Cover of The Sirens of Titan
                The Sirens of Titan

                Kurt Vonnegut & Jr. · standalone novel · 1959

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                The Sirens of Titan is a comic science fiction novel by Kurt Vonnegut Jr., first published in 1959. His second novel, it involves issues of free will, omniscience, and the overall purpose of human history, with much of the story revolving around a Martian invasion of Earth.

              • Cover of Starman Jones
                Starman Jones

                Robert A. Heinlein · standalone novel · 1953

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                Starman Jones, a 1953 science fiction novel by Robert A. Heinlein, features a farm boy who wants to go to the stars. Charles Scribner's Sons published the book as part of the Heinlein juveniles series.

              • Cover of The Gods Themselves
                The Gods Themselves

                Isaac Asimov · standalone novel · 1972

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                The Gods Themselves is a 1972 science fiction novel written by Isaac Asimov, and his first original novel in fifteen years. It won the Nebula Award for Best Novel in 1972, and the Hugo Award for Best Novel in 1973.

              • Cover of Time Odyssey
                Time Odyssey

                series · 3 books · 2003

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                A Time Odyssey is a trilogy of science fiction novels co-written by Arthur C. Clarke and Stephen Baxter. As of 2008, the series consists of:Vol. 1 – Time's Eye Vol. 2 – Sunstorm Vol. 3 – Firstborn

              • Cover of The Black Cloud
                The Black Cloud

                Fred Hoyle · standalone novel · 1957

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                The Black Cloud is a 1957 science fiction novel by British astrophysicist Fred Hoyle. It details the arrival of an enormous cloud of gas that enters the Solar System and appears about to destroy most of the life on Earth by blocking the Sun's radiation.

              • Cover of The Lathe of Heaven
                The Lathe of Heaven

                Ursula K. Le Guin · standalone novel · 1971

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                The Lathe of Heaven is a 1971 science fiction novel by American writer Ursula K. Le Guin, first serialized in the American science fiction magazine Amazing Stories. It won the 1972 Locus Award for Best Novel and was a finalist for the 1971 Nebula Award for Best Novel and 1972 Hugo Award for Best Novel. Two television film adaptations were released: the PBS production, The Lathe of Heaven (1980), and Lathe of Heaven (2002), a remake produced by the A&E Network.

              • Cover of Way Station
                Way Station

                Clifford D. Simak · standalone novel · 1963

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                The human operator of a transfer station for aliens traveling between planets, kept secret from the human race, deals with discovery by the US government and interplanetary political crisis, as well as his own emotional issues.

              • Cover of Time Traders
                Time Traders

                series · 7 books · 1958

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                The Time Traders opens Andre Norton's Cold War-flavored science fiction series, following an American agent recruited to travel into the past and counter a Soviet operation built around ancient technology unearthed from a vanished civilization. Norton, later joined by collaborators Sherwood Smith and P. M. Griffin, expanded the sequence to seven novels published between 1958 and 2002, and revised the opening book herself in 2000. Like several of Norton's other series, it treats leftover technology from a long-gone ancient culture as its central plot engine.

              • Cover of Doona
                Doona

                series · 3 books · 1969

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                Decision at Doona begins Anne McCaffrey's series about a human colony that finds a supposedly uninhabited planet is already home to the Hrrubans, a clan-based, cat-like species — a discovery Terran policy treats as forbidden territory after an earlier first-contact attempt ended in another alien race's mass suicide. The colonists and Hrrubans must negotiate an unprecedented, closely governed coexistence rather than the separation their governments would prefer. Later books, continuing with Jody Lynn Nye, follow the two communities as that arrangement is tested by new arrivals and disputes.

              • Cover of Triptych
                Triptych

                J. M. Frey · standalone novel · 2011

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                Triptych is a 2011 debut novel by Canadian author J.M. Frey. The novel follows three narrators as they recount the events surrounding major turning points in the life of Gwen Pierson, a languages specialist: Evvie Pierson, Gwen's mother a housewife in rural southern Ontario; Kalp, an alien refugee from a dead planet living in England and Gwen's lover; and Basil Grey, a Welsh computer engineer.

              • Cover of Whipping Star
                Whipping Star

                Frank Herbert · standalone novel · 1970

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                From Amazon: In the far future, humankind has made contact with numerous other species: Gowachin, Laclac, Wreaves, Pan Spechi, Taprisiots, and Caleban, and has helped to form the ConSentiency to govern among the species. After suffering under a tyrannous pure democracy, the sentients of the galaxy find the need for a Bureau of Sabotage (BuSab) to slow the wheels of government, thereby preventing it from legislating recklessly. BuSab is allowed to sabotage and harass the governmental, administrative, and economic powers in the ConSentiency. Private citizens must not be harassed, and vital functions of society are also exempt. Jorj X. McKie is a born troublemaker who has become one of BuSab's best agents. Drafted for the impossible task of establishing meaningful communication with an utterly alien entity who defies understanding, McKie finds himself racing against time to prevent a mad billionairess from wiping out all life in the ConSentiency.

              • Cover of Forge of God
                Forge of God

                series · 2 books · 1987

                completed

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                The Forge of God (1987) is Greg Bear's science fiction novel about Earth's discovery that it is the target of an incomprehensible, overwhelming alien attack, following scientists and ordinary people as they try to understand what is destroying the planet. Its 1992 sequel, Anvil of Stars, follows a group of young survivors sent on a mission of interstellar retaliation, continuing directly from the first book's ending.

              • Cover of Have Space Suit - Will Travel
                Have Space Suit - Will Travel

                Robert A. Heinlein · standalone novel · 1958

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                From the back cover of the Del Rey 9th printing: "Skyjacked - Everything happened at once. One minute Kip Russell was walking about in his own backyard, testing out an old space suit and dreaming about going to the moon - and the next he was out cold and the captive of an insidious space pirate. The whole thing seemed like a very bad dream until he discovered he wasn't the only prisoner on board. Then the reality of the situation became inescapable. He - along with the daughter of a world-renowned scientist and a beautiful creature from an alien planet - had been skyjacked by a monstrous extraterrestrial and they were on their way to the Moon... a journey toward a fate worse than death!"

              • HC
                Heaven Chronicles / Zones of Thought

                series · 8 books · 1976

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              • Cover of The Wanderer
                The Wanderer

                Fritz Leiber · standalone novel · 1964

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                The Wanderer is a science fiction novel by American writer Fritz Leiber, published as a paperback original by Ballantine Books in 1964. It won the 1965 Hugo Award for Best Novel.

              • Cover of Footfall
                Footfall

                Larry Niven & Jerry Pournelle · standalone novel · 1985

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                When aliens travel to Earth from Alpha Centauri, differences between alien and human psychology result in an unprovoked invasion, and the resulting resistance results in the aliens' use of a devastating weapon.