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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

See it mapped

On the Star Map →

Cover of Atom Drive by Charles L. Fontenay

Charles L. Fontenay · 1956

Hard SFSpace Opera

Cover of Atomic bonanza by George O. Smith

George O. Smith · 1951

Autour de la Lune

Cover of Autour de la Lune by Jules Verne

Autour de la Lune

Jules Verne · 1870

4 hr 17 min read

Hard SFSpace Opera

Autour de la lune

Cover of Autour de la lune by Jules Verne

Autour de la lune

Jules Verne · 1870

4 hr 21 min read

Hard SFSpace Opera

Aventures extraordinaires d'un savant russe; I. La lune

Cover of Aventures extraordinaires d'un savant russe; I. La lune by Georges Le Faure

Aventures extraordinaires d'un savant russe; I. La lune

Georges Le Faure & H. de Graffigny · 1889

Hard SFSpace Opera

Aventures extraordinaires d'un savant russe; II. Le Soleil et les petites planètes

Cover of Aventures extraordinaires d'un savant russe; II. Le Soleil et les petites planètes by Georges Le Faure

Aventures extraordinaires d'un savant russe; II. Le Soleil et les petites planètes

Georges Le Faure & H. de Graffigny · 1889

Hard SFSpace Opera

Aventures extraordinaires d'un savant russe; III. Les planètes géantes et les comètes

Cover of Aventures extraordinaires d'un savant russe; III. Les planètes géantes et les comètes by Georges Le Faure

Aventures extraordinaires d'un savant russe; III. Les planètes géantes et les comètes

Georges Le Faure & H. de Graffigny · 1889

Hard SFSpace Opera

Aventures extraordinaires d'un savant russe; IV. Le désert sidéral

Cover of Aventures extraordinaires d'un savant russe; IV. Le désert sidéral by Georges Le Faure

Aventures extraordinaires d'un savant russe; IV. Le désert sidéral

Georges Le Faure & H. de Graffigny · 1896

Hard SFSpace Opera

Cover of Backlash by Winston K. Marks

Winston K. Marks · 1954

Be young again!

Cover of Be young again! by Murray Leinster

Be young again!

Murray Leinster · 1950

Berge Meere und Giganten

Cover of Berge Meere und Giganten by Alfred Döblin

Berge Meere und Giganten

Alfred Döblin · 1924

Hard SFSocial SF

Cover of Beyond Pandora by Robert J. Martin

Robert J. Martin · 1962

Beyond The Thunder

Cover of Beyond The Thunder by H. B. Hickey

Beyond The Thunder

H. B. Hickey · 1948

Beyond our control

Cover of Beyond our control by Randall Garrett

Beyond our control

Randall Garrett · 1958

Hard SFSpace Opera

Beyond the Ultra-Violet

Cover of Beyond the Ultra-Violet by Frank M. Robinson

Beyond the Ultra-Violet

Frank M. Robinson · 1951

Beyond the Vanishing Point

Cover of Beyond the Vanishing Point by Ray Cummings

Beyond the Vanishing Point

Ray Cummings · 1931

1 hr 55 min read

Hard SFSpace Opera

Cover of Big Pill by Raymond Z. Gallun

Raymond Z. Gallun · 1952

Hard SFSpace Opera

Cover of Black no more by George S. Schuyler

George S. Schuyler · 1940

3 hr 34 min read

Hard SFSocial SF

Cover of Blind Time by George O. Smith

George O. Smith · 1946

Cover of Brain Teaser by Tom Godwin

Tom Godwin · 1956

Breeder Reaction

Cover of Breeder Reaction by Winston K. Marks

Breeder Reaction

Winston K. Marks · 1954

Brightside Crossing

Cover of Brightside Crossing by Alan Edward Nourse

Brightside Crossing

Alan Edward Nourse · 1956

ColonizationHard SF

Cover of Butterfly 9 by Donald Keith

Donald Keith · 1957

Category Phoenix

Cover of Category Phoenix by Boyd Ellanby

Category Phoenix

Boyd Ellanby · 1952

1 hr 8 min read

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