SF Supernova

The Library

4170 public-domain science-fiction titles

4170 results
Ullr Uprising
Cover of Ullr Uprising by H. Beam Piper
Ullr Uprising
H. Beam Piper · 1953
2 hr 40 min read
ColonizationSpace Opera
Ultima Thule
Cover of Ultima Thule by Mack Reynolds
Ultima Thule
Mack Reynolds · 1961
1 hr 51 min read
Social SFSpace Opera
Ultimatum
Cover of Ultimatum by Roger D. Aycock
Ultimatum
Roger D. Aycock · 1950
7 min read
First ContactSocial SF
Um novo mundo
Cover of Um novo mundo by Guilherme Read Cabral
Um novo mundo
Guilherme Read Cabral · 1895
48 min read
Social SFUtopia
Unbegotten Child
Cover of Unbegotten Child by Winston K. Marks
Unbegotten Child
Winston K. Marks · 1953
15 min read
First ContactSocial SF
Unborn Tomorrow
Cover of Unborn Tomorrow by Mack Reynolds
Unborn Tomorrow
Mack Reynolds · 1959
22 min read
Social SFTime Travel
Uncanny Stories
Cover of Uncanny Stories by May Sinclair
Uncanny Stories
May Sinclair · 1923
4 hr 19 min read
FantasyHorror
Uncle Wiggily in Wonderland
Cover of Uncle Wiggily in Wonderland by Howard Roger Garis
Uncle Wiggily in Wonderland
Howard Roger Garis · 1921
2 hr 27 min read
FantasyJuvenile
Uncle Wiggily on roller skates
Cover of Uncle Wiggily on roller skates by Howard Roger Garis
Uncle Wiggily on roller skates
Howard Roger Garis · 1919
13 min read
FantasyJuvenile
Under Arctic Ice
Cover of Under Arctic Ice by Harry Bates
Under Arctic Ice
Harry Bates · 1933
1 hr 5 min read
AdventureHard SF
Under the Ocean to the South Pole; Or, the Strange Cruise of the Submarine Wonder
Cover of Under the Ocean to the South Pole; Or, the Strange Cruise of the Submarine Wonder by Roy Rockwood
Under the Ocean to the South Pole; Or, the Strange Cruise of the Submarine Wonder
Roy Rockwood · 1907
3 hr 53 min read
AdventureJuvenile
Under the Skin
Cover of Under the Skin by Leslie Perri
Under the Skin
Leslie Perri · 1956
43 min read
Social SFSpace Opera
Underground Man
Cover of Underground Man by Gabriel de Tarde
Underground Man
Gabriel de Tarde · 1905
1 hr 22 min read
DystopiaPost-Apocalyptic
Underground Movement
Cover of Underground Movement by Allen Kim Lang
Underground Movement
Allen Kim Lang · 1956
12 min read
First ContactSocial SF
Undine
Cover of Undine by Freiherr de Friedrich Heinrich Karl La Motte-Fouqué
Undine
Freiherr de Friedrich Heinrich Karl La Motte-Fouqué · 1811
1 hr 54 min read
Fantasy
Undine
Cover of Undine by Freiherr de Friedrich Heinrich Karl La Motte-Fouqué
Undine
Freiherr de Friedrich Heinrich Karl La Motte-Fouqué · 1811
1 hr 33 min read
FantasyJuvenile
Uniform of a Man
Cover of Uniform of a Man by Dave Dryfoos
Uniform of a Man
Dave Dryfoos · 1954
23 min read
Artificial IntelligenceSocial SF
Unspecialist
Cover of Unspecialist by Murray F. Yaco
Unspecialist
Murray F. Yaco · 1960
21 min read
Social SFSpace Opera
Untechnological Employment
Cover of Untechnological Employment by Ed M. Clinton
Untechnological Employment
Ed M. Clinton · 1958
6 min read
DystopiaSocial SF
Unthinkable
Cover of Unthinkable by Rog Phillips
Unthinkable
Rog Phillips · 1948
43 min read
Hard SFSocial SF
Until Life Do Us Part
Cover of Until Life Do Us Part by Winston K. Marks
Until Life Do Us Part
Winston K. Marks · 1955
15 min read
DystopiaSocial SF
Unveiling a Parallel: A Romance
Cover of Unveiling a Parallel: A Romance by Alice Ilgenfritz Jones
Unveiling a Parallel: A Romance
Alice Ilgenfritz Jones & Ella Merchant · 1893
3 hr 9 min read
Social SFUtopia
Unwelcome Tenant
Cover of Unwelcome Tenant by Roger D. Aycock
Unwelcome Tenant
Roger D. Aycock · 1950
8 min read
First ContactPsychic Powers
Unwelcomed Visitor
Cover of Unwelcomed Visitor by Joseph Samachson
Unwelcomed Visitor
Joseph Samachson · 1954
13 min read
First ContactSocial SF