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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 Operation: Time Machine

anchored on:science fictiontime travelour worldcontemporarysecond personadventurous+1 more

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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.
  • The book works as comfort reading — low tension, a soothing pace, and an atmosphere the reader can unwind in.
  • 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 extraterrestrial beings are central — as characters, cultures, or the object of the plot.
  • 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 of lovers kept apart by law, family, faith, or station, where the obstacle to love is the plot.
  • 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 about mourning — living through the death of a loved one and what loss does to the survivors.
  • Stories in which a buried family truth — hidden parentage, crimes, or shames — surfaces and reorders the present.
  • 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.
  • Stories organized around investigating a killing — the case, the clues, and the pursuit of the killer, in any genre's clothing.

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.
            • Multi-generational fiction following a family or dynasty across decades, with inheritance and kinship as the through-line.
              • 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 The Apocalypse Troll
                  The Apocalypse Troll

                  David Weber · standalone novel · 1999

                  similar byour worldcontemporaryscience fictiontime traveladventuroustense

                  The Apocalypse Troll is a novel by American writer David Weber, first published by Baen Books in January 1999. It is a story about time travel and alien invasion.

                • Cover of The Green Futures of Tycho
                  The Green Futures of Tycho

                  William Sleator · standalone novel · 1981

                  similar byour worldcontemporaryscience fictiontime traveltensemiddle grade

                  Publisher's description: "When he finds an ancient, egg-shaped object with which he travels back and forth in time, eleven-year-old Tycho grapples with several terrible futures he sees for himself and his family."

                • Cover of The Resurrection Wager
                  The Resurrection Wager

                  Christopher Coates · standalone novel · 2018

                  similar byour worldcontemporaryscience fictiontime traveltense

                  • "When a man of science and a man of faith develop the ability to go back in time, there is only one place for them to go to demonstrate their new technology. After they make a wager about whether or not the resurrection of Jesus really happened, the two set out to prove it one way or the other. Along the way, they face obstacles and challenges from those who want to use their technology for personal gain." ― quoted from this book's product page on Goodreads.com as of 2020-05-28.

                • Cover of Footfall
                  Footfall

                  Larry Niven & Jerry Pournelle · standalone novel · 1985

                  similar byour worldcontemporaryscience fictiontense+1 more

                  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.

                • Cover of The Accidental Time Machine
                  The Accidental Time Machine

                  Joe Haldeman · standalone novel · 2007

                  similar byour worldcontemporaryscience fictiontime traveladventurous

                  "Grad-school dropout Matt Fuller is toiling as a lowly research assistant at MIT when, while measuring subtle quantum forces that relate to time changes in gravity and electromagnetic force, his calibrator turns into a time machine. With a dead-end job and a girlfriend who has left him for another man, Matt has nothing to lose taking a time machine trip himself - or so he thinks."

                • Cover of Our Children's Children
                  Our Children's Children

                  Clifford D. Simak · standalone novel · 1974

                  similar byour worldcontemporaryscience fictiontime traveltense

                  From the back cover of the first DAW printing: "They were our children's children, and they came one day from nowhere - walking through holes in the air into our world. By means of one-way time tunnels, they fled the ravening beasts with teeth, claws and tentacles, that reproduced like bacteria and were intelligent. They fled to escape the uncontrolled horror of their own far future, and we, their distant ancestors, housed and fed and comforted them, content in their assurance that the tunnel was securely guarded from the beasts, whatever or whoever they were. But then somebody up there slipped and the beasts were abroad..."

                • Cover of The Guardians of Time
                  The Guardians of Time

                  series · 4 books · 2002

                  similar byour worldcontemporarytime traveladventuroustense

                  Guardians of Time is a trilogy of novels written by Marianne Curley. The plot of the trilogy consists of the Guardians of Time, trying to protect the past, present, and future by traveling into the past to thwart their enemies, and the Order of Chaos, who are trying to change past events to give themselves more power.

                • Cover of Saucer
                  Saucer

                  series · 3 books · 2002

                  similar byour worldcontemporaryscience fictionadventuroustense

                  Saucer is Stephen Coonts's techno-thriller trilogy beginning with Saucer (2002), continued in Saucer: The Conquest and Saucer: Savage Planet. It follows the discovery of a functioning craft buried for millennia in the Sahara desert and the test pilots and adventurers who end up flying, and fighting over, it, escalating from a buried desert secret toward wider stakes involving hostile outside interests.

                • Cover of Megamorphs
                  Megamorphs

                  series · 4 books · 1997

                  part of Animorphs

                  similar byour worldcontemporaryscience fictionadventuroustense+2 more

                • Cover of Time Travelers Never Die
                  Time Travelers Never Die

                  series · 2 books · 1996

                  similar byour worldcontemporaryscience fictiontime travel+1 more

                  Time Travelers Never Die started life as a Jack McDevitt novella in the mid-1990s (Hugo- and Nebula-nominated) before he expanded it into a full novel over a decade later; the novella and novel are two forms of the same story rather than a sequel. It follows a small circle of people who gain access to working time travel and use it to step into the past, in McDevitt's characteristic register of curious, history-minded science fiction.

                • Cover of TimeRiders
                  TimeRiders

                  series · 9 books · 2010

                  similar byour worldscience fictiontime traveladventuroustense+1 more

                  TimeRiders is a series of teen science fiction novels written by Alex Scarrow. The series consists of nine books and is published by Puffin Books.

                • Cover of Time War
                  Time War

                  Lin Carter · standalone novel · 1974

                  similar byour worldcontemporaryscience fictiontime traveltense+1 more

                  Time War is a science fiction novel by American writer Lin Carter. It was first published in paperback by Dell Books in November 1974. It was reissued in trade paperback by Wildside Press in March 2018. It also appeared in Staying in Place: An Anthology of Stories to Pass the Time, issued as an ebook by Wildside Press in June 2020. The first British edition was issued as an ebook by Gateway/Orion in October 2019. The book has also appeared in German translation.

                • Cover of The Silver Crown
                  The Silver Crown

                  Robert C. O'Brien · standalone novel · 1968

                  similar byour worldcontemporaryscience fictiontense

                  The Silver Crown is a children's science-fiction book by Robert C. O'Brien. Published in 1968, it was his first novel.

                • Cover of Departure
                  Departure

                  A. G. Riddle · standalone novel · 2014

                  similar byour worldcontemporarytime traveltensescience fiction

                  "The world's past and future rests in the hands of five unwitting strangers in this definitive edition of A. G. Riddle's time-traveling, mind-bending speculative thriller. En route to London from New York, Flight 305 suddenly loses power and crash-lands in the English countryside, plunging a group of strangers into a mysterious adventure that will have repercussions for all of humankind.Struggling to stay alive, the survivors soon realize that the world they've crashed in is very different from the one they left. But where are they? Why are they here? And how will they get back home? Five passengers seem to hold clues about what's really going on: writer Harper Lane, venture capitalist Nick Stone, German genetic researcher Sabrina Schroeder, computer scientist Yul Tan, and Grayson Shaw, the son of a billionaire philanthropist.As more facts about the crash emerge, it becomes clear that some in this group know more than they're letting on--answers that will lead Harper and Nick to uncover a far-reaching conspiracy involving their own lives. As they begin to piece together the truth, they discover they have the power to change the future and the past--to save our world. or end it. A wildly inventive and propulsive adventure full of hairpin twists, Departure is a thrilling tale that weaves together power, ambition, fate, memory, and love, from a bold and visionary talent"--

                • Cover of Time Storm
                  Time Storm

                  Gordon R. Dickson · standalone novel · 1977

                  similar byour worldscience fictionadventuroustensetime travel

                  A time storm has devastated the Earth, and only a small fraction of humankind remains. From the rubble, three survivors form an unlikely alliance: a young man, a young woman, and a leopard. "A masterful science fiction story told by a masterful science fiction writer". -- Milwaukee Journal. A time storm strikes the Earth. The Earth remains, but different parts of the Earth are in different eras. Travel between the different zones is thought to be impossible. The main character, Marc Despard, resolves to fight the time storm. After some struggles, he assembles a small band of people, including one alien, to help him try to understand what has happened and to stop the time storm. He has 2 extraordinary relationships with a older teenaged girl who is speechless for the first part of the book (she was "struck dumb" by the time storm) and with, believe it or not, a leopard. Dickson's writing makes the extraordinary seem quite normal. Ultimately, after being harried by a Mad Max-like group of survivors, he uses a machine found in a different era of time to bring his small band of followers into the future so that he can find those who are trying to fight the time storm. He convinces those future beings that he is capable of fighting the time storm, and ultimately stops it, and gets the girl in the end.

                • Cover of Cragbridge Hall
                  Cragbridge Hall

                  series · 3 books · 2013

                  similar byour worldscience fictionadventuroustensecontemporarytime travelmiddle grade

                • Cover of Drone Racer
                  Drone Racer

                  Andy Briggs · standalone novel · 2018

                  similar byour worldcontemporaryscience fictionadventuroustensemiddle grade

                  Carson and his friends can't believe their luck: they've found a drone at the local scrapyard. And it's fast. Really fast. But there's a lot more to this drone than meets the eye, and someone wants it back. They'll stop at nothing to get it. How can three kids protect their star racer?

                • Cover of Mammoth
                  Mammoth

                  John Varley · standalone novel · 2005

                  similar byour worldcontemporaryscience fictiontime travel+1 more

                  Mammoth is a 2005 novel by author John Varley. The book centers around the concept of time travel, and discusses the concept that there may be limits to science.

                • Cover of Time Soldiers
                  Time Soldiers

                  series · 8 books · 2002

                  similar bycontemporaryscience fictiontime traveladventurousour world

                • Cover of Artemis Fowl
                  Artemis Fowl

                  series · 15 books · 2001

                  similar bycontemporaryour worldadventurousmiddle grade

                  Artemis Fowl is a series of eleven fantasy novels by Irish author Eoin Colfer, revolving around various members of the Fowl family. The first cycle, the Artemis Fowl series, consists of eight books, and the second cycle, The Fowl Twins series, is a trilogy. Both releases have received commercial success and positive critical reception in the children's literature genre, and also originated graphic novel adaptations. As of 2013, the novels have sold more than 21 million copies in 44 languages, and are one of the best-selling series of all time. In 2010, Artemis Fowl was voted by readers as their favorite Puffin Books title of all time.

                • Cover of The Family Tree
                  The Family Tree

                  Sheri S. Tepper · standalone novel · 1997

                  similar bycontemporaryscience fictionadventuroustenseour world

                  Dora Henry is a policewoman who is investigating the possibly connected murders of local scientists; she is married to Jared, a strange and emotionless neat-freak, who dotes on his immaculately trimmed lawn. Their problems begin when The Weed appears in his sidewalk, and violently resists Jared's attempts to eradicate it. Meanwhile, back in the future some 3,000 years later, Prince Sahir, Prince Izzy, and Nassif the Storyteller begin a quest initiated by prophecy, which will ultimately lead them to join with Dora to battle a common enemy.

                • Cover of Tempest (Julie Cross)
                  Tempest (Julie Cross)

                  series · 4 books · 2011

                  similar bycontemporarytensescience fictiontime travelour world+1 more

                  Julie Cross' Tempest trilogy opens with Tempest (2012), a young-adult science-fiction novel published by St. Martin's Press that was nominated for a 2012 RT Book Reviews award and received a starred Kirkus review. It continues across Vortex and Timestorm, published through 2014.

                • Cover of Thunder
                  Thunder

                  series · 3 books · 1995

                  similar byour worldscience fictionadventuroustensetime travel+1 more

                • Cover of Dreamhouse Kings
                  Dreamhouse Kings

                  series · 6 books · 2008

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