Discover / Theme

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 Shock Absorber by E. G. Von Wald

E. G. Von Wald · 1955

Hard SFSpace Opera

Cover of Skylark Three by E. E. Smith

E. E. Smith · 1930

Hard SFSpace Opera

Cover of Slingshot by Irving W. Lande

Irving W. Lande · 1958

Hard SFSpace Opera

Cover of Slow Burn by Henry Still

Henry Still · 1955

Hard SFSocial SF

Cover of Snowball by Poul Anderson

Poul Anderson · 1955

1 hr 1 min read

Hard SFSocial SF

Cover of Solid Solution by James Stamers

James Stamers · 1960

Hard SFSocial SF

Solomon's Orbit

Cover of Solomon's Orbit by William Carroll

Solomon's Orbit

William Carroll · 1957

Hard SFSocial SF

Something Will Turn Up

Cover of Something Will Turn Up by David Mason

Something Will Turn Up

David Mason · 1963

Hard SFSocial SF

Cover of Space Platform by Murray Leinster

Murray Leinster · 1953

3 hr 43 min read

Hard SFMilitary SF

Space Station 1

Cover of Space Station 1 by Frank Belknap Long

Space Station 1

Frank Belknap Long · 1957

3 hr 16 min read

Hard SFSpace Opera

Cover of Space Tug by Murray Leinster

Murray Leinster · 1953

3 hr 33 min read

Hard SFSpace Opera

Spacehounds of IPC

Cover of Spacehounds of IPC by E. E. Smith

Spacehounds of IPC

E. E. Smith · 1931

Hard SFSpace Opera

Spaceman's luck

Cover of Spaceman's luck by George O. Smith

Spaceman's luck

George O. Smith · 1953

Hard SFSpace Opera

Spacemen are born

Cover of Spacemen are born by Bolling Branham

Spacemen are born

Bolling Branham · 1952

Hard SFSpace Opera

Special Delivery

Cover of Special Delivery by George O. Smith

Special Delivery

George O. Smith · 1945

Hard SFSpace Opera

Cover of Spillthrough by Daniel F. Galouye

Daniel F. Galouye · 1953

Hard SFSpace Opera

Stamped Caution

Cover of Stamped Caution by Raymond Z. Gallun

Stamped Caution

Raymond Z. Gallun · 1953

First ContactHard SF

Stay off the Moon!

Cover of Stay off the Moon! by Raymond F. Jones

Stay off the Moon!

Raymond F. Jones · 1962

First ContactHard SF

Stopwatch on the world

Cover of Stopwatch on the world by Daniel R. Gilgannon

Stopwatch on the world

Daniel R. Gilgannon · 1951

Hard SFPost-Apocalyptic

Storm Cloud on Deka

Cover of Storm Cloud on Deka by E. E. Smith

Storm Cloud on Deka

E. E. Smith · 1942

Hard SFSpace Opera

Stroke of Genius

Cover of Stroke of Genius by Randall Garrett

Stroke of Genius

Randall Garrett · 1956

Hard SFSocial SF

Subspace Survivors

Cover of Subspace Survivors by E. E. Smith

Subspace Survivors

E. E. Smith · 1960

Hard SFSpace Opera

Summer Snow Storm

Cover of Summer Snow Storm by Stephen Marlowe

Summer Snow Storm

Stephen Marlowe · 1956

Hard SFSocial SF

Cover of Sunfire! by Edmond Hamilton

Edmond Hamilton · 1962

First ContactHard SF

Comments 0

Sign in to join the conversation.

No comments yet. Sign in to be the first.