Loreful
HomeDiscover
Search series, authors…⌘K
Loreful

Reading orders for SF/F series and shared universes — with your place kept in every one.

Explore

UniversesSeriesWorksAuthorsAtlas

Help

FAQAboutSite map

Account & legal

Sign inCreate accountPrivacyTerms

Data

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 Amoeba

anchored on:science fiction

but

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 driven by deliberate modification of genomes — designer organisms, engineered humans, and the consequences of remaking life.
  • Stories about venturing into space to explore — survey missions, astronauts, and the frontier of the unknown beyond Earth.
  • 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 about rising against rulers — uprisings, resistance movements, and revolutions and their aftermaths.
  • 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 Dune
                  Dune

                  series · 20 books · 1963

                  part of Dune Universe

                  similar byscience fiction

                  Frank Herbert's Dune Chronicles opens with 1965's Dune, set on the desert planet Arrakis where House Atreides takes control of the only source of the vital spice melange and young Paul Atreides is pulled into a struggle over its politics and religion. Herbert carried the story forward across five further novels — Dune Messiah, Children of Dune, God Emperor of Dune, Heretics of Dune, and Chapterhouse: Dune — following Paul's line over the following millennia, before Brian Herbert and Kevin J. Anderson later extended the saga. Many other editions of these six novels are omnibus and box-set repackagings rather than separate stories.

                • Cover of Brave New World
                  Brave New World

                  series · 8 books · 1932

                  similar byscience fiction+1 more

                  Aldous Huxley's 1932 novel imagines a future World State where reproduction, social caste, and desire are all engineered before birth, and the population is kept content through conditioning, sleep-hypnosis, and a mood-altering drug called soma. The story follows the disruption this seemingly stable order suffers when an outsider raised beyond its reach is brought into it, exposing what the society traded away for comfort and order. Some editions pair the novel with Huxley's own 1958 nonfiction essay collection, Brave New World Revisited, which reassesses the book's ideas rather than continuing its story.

                • Cover of Ender Wiggin
                  Ender Wiggin

                  series · 14 books · 1977

                  part of Ender's Game Universe

                  similar byscience fiction

                  Orson Scott Card's Ender's Game (1985, expanded from his 1977 novella) follows child prodigy Andrew "Ender" Wiggin as he is recruited into a military training program built to prepare Earth's defenses for an anticipated third war against an insectoid alien species known as the Formics. The saga continues years later through Speaker for the Dead and Xenocide, following an older Ender as he confronts the moral weight of his role in that earlier conflict, and concludes the core arc in Children of the Mind, with Ender in Exile filling in the years between the first two books. Set within the wider Ender's Game universe, the series shifts from military coming-of-age story to slower, more philosophical science fiction as it progresses.

                • Cover of A Midsummer Night's Gene
                  A Midsummer Night's Gene

                  Andrew Harman · standalone novel · 1997

                  similar bygenetic engineeringscience fictionwhimsicalfunnyhumor

                  A Midsummer Night's Gene is a comedy science fiction novel written by Andrew Harman and published in 1997 by Random House. The novel is loosely based on Shakespeare's play A Midsummer Night's Dream.

                • Cover of Flowers for Algernon
                  Flowers for Algernon

                  Daniel Keyes · standalone novel · 1966

                  similar bygenetic engineeringscience fiction

                  A man with a low IQ becomes the subject of an experimental medical procedure which raises his IQ well over genius level.

                • Cover of Moties
                  Moties

                  series · 4 books · 1974

                  part of CoDominium

                  similar byscience fiction

                  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 The Chrysalids
                  The Chrysalids

                  John Wyndham · standalone novel · 1955

                  similar bygenetic engineeringscience fiction

                  The Chrysalids is a science fiction novel by British writer John Wyndham, first published in 1955 by Michael Joseph. It is the least typical of Wyndham's major novels, but regarded by some as his best. An early manuscript version was entitled Time for a Change.

                • Cover of Vorkosigan
                  Vorkosigan

                  universe · 27 books · 1986

                  Start hereShards of Honor · Chronological start

                  similar byscience fiction

                  On Barrayar they will tell you that a man is measured by his forebears and the straightness of his spine — which is a difficulty for Miles Vorkosigan, born brittle-boned and half-height into the highest military caste of a planet that not long ago left such infants on the hillside to die. Beyond his backwater lies the wormhole nexus: a scatter of human worlds strung along unstable jump-routes, where a blood-and-honor warrior aristocracy, a coolly egalitarian utopia, and a hundred lesser polities trade, spy, and go to war. Miles cannot pass the physicals. So he builds himself a fleet, a false name, and a career out of sheer talky brilliance and a constitutional refusal to sit still. Lois McMaster Bujold has spent decades on this future, and it reads as one long life more than a franchise. It opens a generation early with Miles's mother, Cordelia — a level-headed survey captain from Beta Colony who marries into Barrayaran politics — before handing the saga to Miles himself, from teenage con-artist admiral to Imperial troubleshooter, and eventually to the next generation. Around that spine stand companion novels set elsewhere in the nexus: Falling Free, among the engineered zero-gee "quaddies"; Ethan of Athos; and the later books. Many volumes are gathered into omnibuses; several have taken Hugo Awards. The pleasure is voice and heart more than hardware — comedies of intrigue that turn, without warning, into hard questions about disability, ambition, biology as destiny, and what honor costs the people who keep it. Newcomers have two clean doors: Shards of Honor (paired with Barrayar as Cordelia's Honor) for the chronological start, or The Warrior's Apprentice to meet Miles at full velocity.

                • Cover of Old Man's War
                  Old Man's War

                  series · 16 books · 2005

                  similar byscience fiction

                  The Old Man's War series is a series of science fiction novels by John Scalzi. The first book in the series, Old Man's War, was first published in 2005 by Tor Books, and was nominated for the Hugo Award for Best Novel in 2006. In 2026 it was a finalist for the Hugo Award for Best Series.

                • Cover of The Gods Themselves
                  The Gods Themselves

                  Isaac Asimov · standalone novel · 1972

                  similar byscience fiction+1 more

                  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 Uplift Universe
                  Uplift Universe

                  universe · 13 books · 1980

                  Start hereUplift · Start here

                  similar byscience fiction+1 more

                  No species, the Galactics insist, ever climbs to sapience alone. For a billion years the elder races have "uplifted" their chosen clients — reshaping some promising animal, gene by patient gene, into a thinking being, then binding it through long ages of indenture. Patron lifts client; client one day becomes patron; and every lineage traces back through the vast Galactic Library to the vanished Progenitors who began it all. Then a ragged band of primates arrives at the stars with no patron to claim them — wolflings, self-made, an affront to a hundred thousand years of law — and worse, these humans have already started uplifting neighbors of their own: the neo-dolphins and neo-chimpanzees of Earthclan. David Brin builds this galaxy across two trilogies. The first — Sundiver, the Hugo- and Nebula-winning Startide Rising, and the Hugo-winning The Uplift War — sends an expedition into the Sun, then follows the dolphin-crewed survey ship Streaker as it flees a discovery that sets fanatical star-clans at war, and a chimp-led resistance on an invaded colony world. The second sequence, Uplift Storm — Brightness Reef, Infinity's Shore, Heaven's Reach — descends to Jijo, a forbidden world where six fallen races hide as illegal settlers, and draws every loose thread toward a reckoning. Short fiction fills the margins. This is space opera with an ecologist's conscience: teeming with invented biologies, wry cross-species banter, and real unease about what we owe the minds we make. Begin with Startide Rising — the saga's beating heart, and readable on its own — or take Sundiver first and read straight through in publication order.

                • Cover of Beyond This Horizon
                  Beyond This Horizon

                  Robert A. Heinlein · standalone novel · 1948

                  similar bygenetic engineeringscience fiction

                  From the front flap of a 2001 Baen reprint: "Utopia has been achieved. For centuries, disease, hunger, poverty, and war have been things found only in the history tapes. And applied genetics has given men and women the bodies of athletes and a lifespan of over a century. They should all have been very happy... But Hamilton Felix is bored. And he is the culmination of a star line, each of his last thirty ancestors chosen for superior genes. Hamilton is, as far as genetics can produce one, the ultimate man. And this ultimate man can see no reason why the human race should survive, and has no intention of continuing the pointless comedy. However, Hamilton's life is about to become less boring. A secret cabal of revolutionaries who find utopia not just boring, but desperately in need of leaders who know just What Needs to be Done, are planning to revolt and put themselves in charge. Knowing of Hamilton's disenchantment with the modern world, they have recruited him to join their Glorious Revolution. Big mistake! The revolutionaries are about to find out that recruiting a superman was definitely not a good idea..."

                • Cover of The Android's Dream
                  The Android's Dream

                  series · 2 books · 2006

                  similar bygenetic engineeringscience fictionfunnyhumor

                  A minor diplomatic insult with a genetically engineered sheep breed spirals into a full interstellar crisis when the last surviving specimen of the 'Android's Dream' breed, needed for a critical ceremony with the alien Nidu, turns out to have been hunted to extinction by a Nidu faction bent on provoking war. John Scalzi's The Android's Dream follows ex-soldier Harry Creek as the hunt for a replacement leads him to Robin Baker, an ordinary woman carrying hidden sheep DNA that makes her the key to avoiding a war. It's a standalone comic space opera rather than an ongoing series.

                • Cover of Mars (Kim Stanley Robinson)
                  Mars (Kim Stanley Robinson)

                  series · 36 books · 1982

                  similar byscience fiction

                  The Mars trilogy is a series of science fiction novels by Kim Stanley Robinson that chronicles the settlement and terraforming of the planet Mars through the personal and detailed viewpoints of a wide variety of characters spanning 187 years, from 2026 to 2212. Ultimately more utopian than dystopian, the story focuses on egalitarian, sociological, and scientific advances made on Mars, while Earth suffers from overpopulation and ecological disaster.

                • Cover of Stand on Zanzibar
                  Stand on Zanzibar

                  John Brunner · standalone novel · 1968

                  similar bygenetic engineeringscience fiction

                  Stand on Zanzibar is a dystopian New Wave science fiction novel written by John Brunner and first in part published in New Worlds magazine in 1967 and in book form in 1968. The book won a Hugo Award for Best Novel at the 27th World Science Fiction Convention in 1969, as well as the 1969 BSFA Award and the 1973 Prix Tour-Apollo Award.

                • Cover of The Hunger Games
                  The Hunger Games

                  series · 3 books · 2008

                  part of The Hunger Games Universe

                  similar byscience fiction

                  The Hunger Games is a series of young adult dystopian novels written by American author Suzanne Collins. The series consists of a trilogy that follows teenage protagonist Katniss Everdeen, as well as two prequels. The Hunger Games universe is a dystopia set in Panem, a post-apocalyptic North American country consisting of the wealthy Capitol and 12 districts in varying states of poverty. As punishment for rebellion, the Capitol hosts an annual battle royale competition called The Hunger Games. Each of the 12 districts must send two children between the ages of 12 and 18 to participate, and the last surviving child is dubbed the victor.

                • Cover of Slan
                  Slan

                  series · 2 books · 1946

                  similar byscience fiction+1 more

                  Slan (1946) is A. E. van Vogt's science fiction novel about slans, a persecuted race of telepathic superbeings living hidden among ordinary humans, first serialized in Astounding Science Fiction before its Arkham House hardcover edition. More than sixty years later, Kevin J. Anderson completed Slan Hunter (2007), an authorized sequel built from van Vogt's notes to continue the story left unfinished at the original author's death. The two novels together bracket a single continuing narrative rather than an ongoing series.

                • Cover of Uplift
                  Uplift

                  series · 5 books · 1980

                  part of Uplift Universe

                  similar byscience fiction+1 more

                  David Brin's Uplift trilogy opens with Sundiver, sending human explorers into the Sun itself, then follows a dolphin-crewed starship on the run from hostile aliens in Startide Rising and a fight over the colony world Garth in The Uplift War. The books sit inside Brin's wider Uplift Universe, built on the idea that spacefaring "patron" species genetically engineer younger "client" species into full sapience, with humanity an anomaly that reached the stars without a patron of its own.

                • Cover of The Big Aha
                  The Big Aha

                  Rudy Rucker · standalone novel · 2013

                  similar bygenetic engineeringscience fiction+1 more

                  Biotech has replaced machines. Qrude young artist Zad Plant works with living paint. But Zad's career is on the skids, and wife Jane has thrown him out. Enter qwet-or quantum wetware. Qwet makes you high-and it gives you telepathy. A cultural evolution begins. But hungry mouths begin popping out of the air and eating people. Zad and Jane travel through a wormhole to confront the aliens. And they meet something stranger than ever imagined. What is the Big Aha? SF master Rudy Rucker's wildest adventure yet.

                • Cover of The Hunger Games Universe
                  The Hunger Games Universe

                  universe · 5 books · 2008

                  Start hereThe Hunger Games · Start here

                  similar byscience fiction

                  Panem, they call it now — a nation raised on the drowned bones of North America, a glittering Capitol ringed by twelve districts it once starved into obedience. Every year the Capitol collects its debt in children: two tributes from each district, drawn by lottery, dropped into an engineered arena, and made to kill one another on live television while the whole country is required to watch. This is the Hunger Games — entertainment, punishment, and government at once. Suzanne Collins tells it in a compact, unified body of work. The founding trilogy — The Hunger Games, Catching Fire, and Mockingjay — follows Katniss Everdeen, a girl from the coal-mining District 12 who volunteers in her sister's place and becomes something the Capitol never scripted. Two prequels reach back into the same machinery: The Ballad of Songbirds and Snakes traces a young Coriolanus Snow long before he is President, and Sunrise on the Reaping returns to District 12 a generation ahead of Katniss. Begin with the trilogy, in order — it is Katniss's voice, close and present-tense, that makes Panem breathe, and the prequels land hardest once you know how her story ends. Beneath the spectacle sits one steady, uncomfortable question: who profits when we agree to look away.

                • Cover of Friday
                  Friday

                  Robert A. Heinlein · standalone novel · 1982

                  similar bygenetic engineeringscience fiction

                  Friday is a 1982 science fiction novel by American writer Robert A. Heinlein. It is the story of a female "artificial person", the eponymous Friday, genetically engineered to be stronger, faster, smarter, and generally better than normal humans. Artificial humans are widely resented, and much of the story deals with Friday's struggle both against prejudice and to conceal her enhanced attributes from other humans. The story is set in a Balkanized 21st century, in which the nations of the North American continent have been split up into a number of smaller states.

                • Cover of Blood Music
                  Blood Music

                  Greg Bear · standalone novel · 1985

                  similar bygenetic engineeringscience fiction

                  Blood Music is a 1985 science fiction novel by American writer Greg Bear. It is an expanded version of a short story of the same title, originally published in the June 1983 issue of Analog and the winner of both the 1983 Nebula and 1984 Hugo awards for Best Novelette. The novel won the 1986 Prix Apollo Award, given to the best science fiction novel published in France during the preceding year, under the title La Musique du sang.

                • Cover of Pandora
                  Pandora

                  series · 4 books · 1966

                  similar byscience fiction+1 more

                  The Pandora Sequence opens with Frank Herbert's solo novel Destination: Void, in which a starship crew must jury-rig a working artificial consciousness after their vessel's control systems fail. Bill Ransom co-writes the three novels that follow, carrying the survivors to the world Pandora, where they must contend with both a manipulative machine intelligence and the planet's own hostile ecology. Across its four books the series moves from a claustrophobic ship-bound crisis to a generations-long struggle over faith, control, and survival on a dangerous new world.

                • Cover of The Eyes of Heisenberg
                  The Eyes of Heisenberg

                  Frank Herbert · standalone novel · 1966

                  similar bygenetic engineeringscience fiction

                  Tens of thousands of years in the future, Earth is ruled by the Optimen, a genetically engineered aristocracy that has made itself functionally immortal, while ordinary people, the Folk, live under strict reproductive control. When Harvey and Lizbeth Durant arrive to have their embryo genetically screened, the examining doctor finds something in the child no one has seen in a very long time: real potential for both fertility and life span, traits the Optimen have arrogated to themselves. Rather than destroy the embryo as policy demands, the doctor hesitates, setting off a chain of surveillance, suspicion and resistance. A tightly wound Frank Herbert thriller about genetic caste and rebellion.