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Cover of Sirius by Olaf Stapledon
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Sirius

Olaf Stapledon

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Similar in themes

These books are ranked using the themes labels extracted for Sirius.

Themes labels used: alienation, otherness, identity, belonging, consciousness, humanity, nature versus nurture, intelligence, love, loneliness, religion, spirit, society and prejudice, ethics of experimentation, war, fear of the unknown, community, soul, meaning of life, free will, self-worth, difference, empathy, bigotry, disability

This does not mean the books share the same plot, setting, quality, or difficulty. It means their themes embeddings are close.

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Cover of Gladiator by Philip Wylie

Gladiator

Philip Wylie · 1930

A super-strong man’s life unfolds as he searches for belonging while society fears the gift that sets him apart.

Why this is here

Themes labels: alienation · otherness · individualism · human nature · morality · responsibility · purpose · identity · belonging · society and difference · war futility · disillusionment · eugenics · superiority · gift and burden · fear of difference · modernity · nature vs nurture · loneliness · bullying · social criticism · human limitation · power and ethics · self-control · despair · hope · sexism · racism

Semantic match: ranked by themes

Distance: 0.0710

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Cover of Frankenstein by Mary Wollstonecraft Shelley

Frankenstein

Mary Wollstonecraft Shelley · 2017

A scientist’s pursuit of life beyond death unleashes a tragic chain of responsibility, rejection, and ruin.

Why this is here

Themes labels: ambition · responsibility · morality · humanity · alienation · loneliness · rejection · nature vs nurture · prejudice · class · ethics · science and ethics · knowledge and consequences · love and belonging · identity · grief · obsession · isolation · social judgement

Semantic match: ranked by themes

Distance: 0.0775

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Cover of Vaster Than Empires and More Slow by Ursula K. Le Guin

Vaster Than Empires and More Slow

Ursula K. Le Guin · The Hainish Cycle

A misfit survey crew meets a forest world whose plant-life seems to feel fear and think as one.

Why this is here

Themes labels: empathy · fear · the Other · acceptance · interpersonal conflict · consciousness · intelligence · community · loneliness · alienation · migration · ecology · planetary ethics · ableism · difference · coexistence · human nature · contact with unknown · time perspective · sacrifice

Semantic match: ranked by themes

Distance: 0.0812

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Cover of More Than Human by Theodore Sturgeon

More Than Human

Theodore Sturgeon · 1979

Misfit children with psychic gifts form a shared consciousness and must decide what power, identity, and humanity mean.

Why this is here

Themes labels: identity · belonging · loneliness · morality · ethics · human evolution · individuality · collective self · symbiosis · alienation · power · conscience · difference · social acceptance · humanity · psychiatry · sanity · morality and power · group purpose

Semantic match: ranked by themes

Distance: 0.0880

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Cover of エルフェンリート 1 [Elfen Lied 1] by Lynn Okamoto

エルフェンリート 1 [Elfen Lied 1]

Lynn Okamoto, 岡本倫 · 2002 · Elfen Lied

An escaped mutant with split identities is taken in by strangers while the government hunts her down.

Why this is here

Themes labels: identity · prejudice · discrimination · abuse · trauma · alienation · revenge · human cruelty · loneliness · nature vs nurture · dehumanization · survival · acceptance · jealousy · self-worth

Semantic match: ranked by themes

Distance: 0.0940

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Cover of Absolute Martian Manhunter (2025-) #1 by Deniz Camp

Absolute Martian Manhunter (2025-) #1

Deniz Camp · 2025 · Absolute Martian Manhunter (2025)

An FBI agent survives a bombing and begins experiencing a reality-bending psychic shift that blurs human and alien identity.

Why this is here

Themes labels: alienation · human nature · identity · sanity · perception · society · prejudice · violence · investigation · selfhood · integration · morality

Semantic match: ranked by themes

Distance: 0.0941

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Cover of The Pretender by K.A. Applegate

The Pretender

K.A. Applegate, Katherine Applegate · 1998 · Animorphs

A hawk-bodied teen faces a family trap, a rescue mission, and a shattering truth about who he really is.

Why this is here

Themes labels: identity · belonging · humanity · otherness · family · war morality · sacrifice · instinct vs emotion · self-acceptance · survival · trauma · prejudice · love vs duty · choice · loyalty

Semantic match: ranked by themes

Distance: 0.0944

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Cover of The Similars by Rebecca Hanover

The Similars

Rebecca Hanover · 2019 · The Similars

At an elite boarding school, a grieving teen confronts a clone of her dead best friend and a web of secrets.

Why this is here

Themes labels: identity · humanity · clone rights · grief · loss · ethics · scientific advancement · prejudice · xenophobia · discrimination · belonging · individuality · nature vs nurture · privacy · consent · moral ambiguity · fear of difference · political overtones

Semantic match: ranked by themes

Distance: 0.0947

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Cover of The Dreaming Jewels by Theodore Sturgeon

The Dreaming Jewels

Theodore Sturgeon, Теодор Стърджън · 1995

An abused boy flees to a traveling carnival and uncovers a strange lifeform, hidden powers, and the meaning of being human.

Why this is here

Themes labels: humanity · difference · alienation · acceptance · child abuse · gender · identity · love · empathy · marginalization · otherness · social commentary · body autonomy · human nature · creation

Semantic match: ranked by themes

Distance: 0.0954

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Cover of The House of the Scorpion by Nancy Farmer

The House of the Scorpion

Nancy Farmer · 2002 · Matteo Alacran

A cloned boy raised as property in a drug lord’s future borderland must confront what makes him human.

Why this is here

Themes labels: humanity · identity · nature versus nurture · free will · individuality · self-determination · prejudice · slavery · power · corruption · dehumanization · human rights · belonging · acceptance · loyalty · morality · ethics of cloning · survival · compassion · empathy · immortality · addiction · sacrifice · predestination

Semantic match: ranked by themes

Distance: 0.0981

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Cover of The World Wasn't Ready for You by Justin C. Key

The World Wasn't Ready for You

Justin C. Key · 2023

A debut short-story collection fusing horror, sci-fi, and fantasy to confront race, class, prejudice, and identity.

Why this is here

Themes labels: race · class · prejudice · love · exclusion · loneliness · identity · consent · ethics · systemic racism · oppression · dehumanization · empathy · humanity · grief · motherhood · fatherhood · technology and ethics · body autonomy · social justice · alienation · trauma · mental health · neurodiversity · immigration · Xenophobia · panic · survival

Semantic match: ranked by themes

Distance: 0.0984

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Cover of A Song for Lya by George R.R. Martin

A Song for Lya

George R.R. Martin · 2005

Two telepaths investigate a world where humans are joining an alien faith that promises total belonging at a deadly cost.

Why this is here

Themes labels: love · loneliness · connection · belonging · religion · faith · God · death · happiness · identity · communication · human condition · existentialism · truth · selfhood · sacrifice · individuality vs collectivity · search for meaning · desire for unity · alien intelligence

Semantic match: ranked by themes

Distance: 0.1006

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Cover of First Day on Earth by Cecil Castellucci

First Day on Earth

Cecil Castellucci · 2011

An angry, lonely teen who believes he was abducted by aliens meets someone who may help him escape Earth.

Why this is here

Themes labels: alienation · belonging · loneliness · identity · self-acceptance · abandonment · alcoholism · depression · grief · trauma · friendship · empathy · choice · escape · hope · humanity · reality vs belief · illusion vs truth · adolescence · social cruelty · outsiderhood

Semantic match: ranked by themes

Distance: 0.1010

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Cover of The Mad Scientist's Daughter by Cassandra Rose Clarke

The Mad Scientist's Daughter

Cassandra Rose Clarke · 2013

A girl grows up with her android tutor as love, identity, and robot rights reshape both their lives.

Why this is here

Themes labels: humanity · consciousness · sentience · free will · love · desire · identity · personhood · rights · autonomy · loss · grief · selfishness · moral ambiguity · social conformity · alienation · discrimination · othering · coming of age · emotional repression · compassion · redemption · choice · societal pressure

Semantic match: ranked by themes

Distance: 0.1014

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Cover of The Shape of Water by Guillermo del Toro

The Shape of Water

Guillermo del Toro, Daniel Kraus · 2018

In 1962 Baltimore, a mute janitor falls for a captured amphibious being and risks everything to free him.

Why this is here

Themes labels: otherness · acceptance · love · freedom · captivity · communication · mutual understanding · dehumanization · prejudice · racism · sexism · homophobia · class inequality · compassion · monstrosity · humanity · allyship · agency · war trauma · science ethics

Semantic match: ranked by themes

Distance: 0.1027

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Cover of Lágrimas en la lluvia by Rosa Montero

Lágrimas en la lluvia

Rosa Montero · 2011 · Bruna Husky

A replicant detective in future Madrid investigates violent deaths while uncovering a conspiracy that threatens her kind.

Why this is here

Themes labels: identity · memory · mortality · death · survival · ethics · morality · love · need for others · loneliness · alienation · social inequality · racism · specism · discrimination · political corruption · power · freedom · privacy · truth · history manipulation · climate change · environmental collapse · class division · humanity · acceptance of difference

Semantic match: ranked by themes

Distance: 0.1030

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Cover of A Wind in the Door by Madeleine L'Engle

A Wind in the Door

Madeleine L'Engle · 1976 · Time Quintet

Meg must help save her gifted, bullied brother by journeying into a strange inner world where love, naming, and evil collide.

Why this is here

Themes labels: love · acceptance · identity · individual worth · connectedness · faith and science · good and evil · bullying · difference · free will · naming · sacrifice · compassion · spiritual struggle · human significance · community

Semantic match: ranked by themes

Distance: 0.1032

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Cover of Allegiant by Veronica Roth

Allegiant

Veronica Roth · 2013 · Divergent

In a shattered dystopia, Tris and Tobias venture beyond the fence and uncover truths that upend everything.

Why this is here

Themes labels: identity · loyalty · sacrifice · love · courage · truth · free will · choice · human nature · grief · war · betrayal · selflessness · nature vs nurture · power · social control · morality · belonging

Semantic match: ranked by themes

Distance: 0.1034

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Cover of Incarnate by Jodi Meadows

Incarnate

Jodi Meadows · 2012 · Newsoul

A shunned new soul seeks answers in a reincarnated society where her existence may upend everything.

Why this is here

Themes labels: identity · self-worth · belonging · prejudice · abuse recovery · trust · love and acceptance · change · free will · meaning of life · mortality · reincarnation · gender fluidity · societal stagnation · religion · social exclusion · self-discovery

Semantic match: ranked by themes

Distance: 0.1036

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Cover of The Left Hand of Darkness by Ursula K. Le Guin

The Left Hand of Darkness

Ursula K. Le Guin · 2000 · The Hainish Cycle

A lone envoy visits an icebound alien world to win allies, and confronts a radically different culture and gender system.

Why this is here

Themes labels: gender · identity · otherness · prejudice · communication · patriotism · power · war · civilization · humanity · acceptance · friendship · love · truth · loneliness · survival · dualism · wholeness · politics · religion · anthropology · psychology

Semantic match: ranked by themes

Distance: 0.1043

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Cover of Enemy Mine by Barry B. Longyear

Enemy Mine

Barry B. Longyear, David Gerrold · 1985 · Enemy Mine

Two enemy pilots crash on a hostile planet and must survive together, slowly turning hatred into trust.

Why this is here

Themes labels: war · prejudice · racism · xenophobia · tolerance · empathy · humanity · otherness · cultural relativism · religion · philosophy · survival · honor · family · companionate love · peace · dehumanization · understanding

Semantic match: ranked by themes

Distance: 0.1049

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Cover of Fox Forever by Mary E. Pearson

Fox Forever

Mary E. Pearson · 2013 · Jenna Fox Chronicles

A young man with a bioengineered body goes undercover for the resistance and falls for the official’s daughter.

Why this is here

Themes labels: humanity · identity · redemption · hope · prejudice · discrimination · social inequality · morality · bioethics · medical ethics · freedom · citizenship · belonging · love vs duty

Semantic match: ranked by themes

Distance: 0.1049

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Cover of The Prey of Gods by Nicky Drayden

The Prey of Gods

Nicky Drayden · 2017

In near-future South Africa, a drug-fueled power shift sparks gods, robots, and misfits into a chaotic fight for survival.

Why this is here

Themes labels: identity · self-discovery · belonging · love · acceptance · family · power · worship · fear · technology and humanity · tradition vs modernity · race · class · gender · sexuality · chronic illness · pain · memory · agency · dehumanization · community

Semantic match: ranked by themes

Distance: 0.1052

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