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Hard SF

Rigorous scientific speculation.

521 titles

Often paired with

Social SF 129 Space Opera 121 Adventure 68 First Contact 35 Horror 32 Post-Apocalyptic 22

Peaks in

1950s 1940s 1960s 1930s 1890s

Explored most by

Jules Verne George O. Smith H. G. Wells Luis Senarens Murray Leinster E. E. Smith Mary Wollstonecraft Shelley Ray Cummings

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To Mars via the Moon: An Astronomical Story

Cover of To Mars via the Moon: An Astronomical Story by Mark Wicks

To Mars via the Moon: An Astronomical Story

Mark Wicks · 1911

Hard SFSpace Opera

Tom Swift and his talking pictures

Cover of Tom Swift and his talking pictures by Victor Appleton

Tom Swift and his talking pictures

Victor Appleton · 1928

3 hr 14 min read

Hard SFJuvenile

Cover of Toy Shop by Harry Harrison

Harry Harrison · 1962

Hard SFSocial SF

Cover of Transient by William Harris

William Harris · 1962

Artificial IntelligenceHard SF

Cover of Triplanetary by E. E. Smith

E. E. Smith · 1934

3 hr 27 min read

Hard SFSpace Opera

Cover of Triplanetary by E. E. Smith

E. E. Smith · 1948

Hard SFSpace Opera

Cover of Trouble by George O. Smith

George O. Smith · 1946

Hard SFSocial SF

Trouble Near the Sun

Cover of Trouble Near the Sun by Alan J. Ramm

Trouble Near the Sun

Alan J. Ramm · 1954

Hard SFSpace Opera

Trouble Times Two

Cover of Trouble Times Two by George O. Smith

Trouble Times Two

George O. Smith · 1945

Hard SFSocial SF

Cover of Turnover Point by Alfred Coppel

Alfred Coppel · 1953

Hard SFSpace Opera

Twelve Times Zero

Cover of Twelve Times Zero by Howard Browne

Twelve Times Zero

Howard Browne · 1952

1 hr 34 min read

First ContactHard SF

Cover of Two Timer by Fredric Brown

Fredric Brown · 1954

Hard SFTime Travel

Two worlds for one

Cover of Two worlds for one by George O. Smith

Two worlds for one

George O. Smith · 1950

DystopiaHard SF

Under Arctic Ice

Cover of Under Arctic Ice by Harry Bates

Under Arctic Ice

Harry Bates · 1933

1 hr 5 min read

AdventureHard SF

Cover of Unthinkable by Rog Phillips

Rog Phillips · 1948

Hard SFSocial SF

Cover of Urania by Camille Flammarion

Camille Flammarion · 1890

3 hr 1 min read

Utazás a Holdba kilenczvenhét óra és husz percz alatt

Cover of Utazás a Holdba kilenczvenhét óra és husz percz alatt by Jules Verne

Utazás a Holdba kilenczvenhét óra és husz percz alatt

Jules Verne · 1865

3 hr 33 min read

AdventureHard SF

Vanishing Point

Cover of Vanishing Point by C. C. Beck

Vanishing Point

C. C. Beck · 1959

Hard SFSocial SF

Varastettu basilli ja muita kertomuksia

Cover of Varastettu basilli ja muita kertomuksia by H. G. Wells

Varastettu basilli ja muita kertomuksia

H. G. Wells · 1895

1 hr 47 min read

Hard SFSocial SF

Venus Equilateral

Cover of Venus Equilateral by George O. Smith

Venus Equilateral

George O. Smith · 1942

Hard SFSpace Opera

Viisi viikkoa ilmapallossa

Cover of Viisi viikkoa ilmapallossa by Jules Verne

Viisi viikkoa ilmapallossa

Jules Verne · 1863

AdventureHard SF

Cover of Világ ura by Jules Verne

Jules Verne · 1904

3 hr 27 min read

AdventureHard SF

Vital Ingredient

Cover of Vital Ingredient by Charles V. De Vet

Vital Ingredient

Charles V. De Vet · 1959

First ContactHard SF

Vital Ingredient

Cover of Vital Ingredient by Gerald Vance

Vital Ingredient

Gerald Vance · 1955

Hard SFSocial SF

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