PG rated sci-fi books

3620 books

Sci-fi books with mild content — safe for most readers. May contain mild peril or fantasy violence but nothing graphic.

The Sins of the Fathers
The Sins of the Fathers
Stanley Schmidt
PG
A Call to Arms
A Call to Arms
Alan Dean Foster
PG
Quozl
Quozl
Alan Dean Foster
PG
The Fortress of Utopia
The Fortress of Utopia
Jack Williamson
PG
After World's End
After World's End
Jack Williamson
PG
A Question of Destiny
A Question of Destiny
Pamela F. Service
PG
The Princes of the Air
The Princes of the Air
John M. Ford
PG
Trivana 1
Trivana 1
Charles Barren; R. Cox Abel
PG
Under Alien Stars
Under Alien Stars
Pamela F. Service
PG
The Dramaturges of Yan
The Dramaturges of Yan
John Brunner
PG
The Tides of Time
The Tides of Time
John Brunner
PG
A Quiet of Stone
A Quiet of Stone
Stephen Leigh
PG
Ocean on Top
Ocean on Top
Hal Clement
PG
Replica
Replica
Richard Bowker
PG
The Efficiency Expert
The Efficiency Expert
Edgar Rice Burroughs
PG
Dark Star
Dark Star
Alan Dean Foster
PG
Animal Phantoms: Fin, Fur and Feather Ghosts
Animal Phantoms: Fin, Fur and Feather Ghosts
Barbara Smith
PG
The People That Time Forgot
The People That Time Forgot
Edgar Rice Burroughs
PG
The False Mirror
The False Mirror
Alan Dean Foster
PG
Chorus Skating
Chorus Skating
Alan Dean Foster
PG
The Hour of the Gate
The Hour of the Gate
Alan Dean Foster
PG
Flight into Yesterday
Flight into Yesterday
Charles L. Harness
PG
The Day of the Dissonance
The Day of the Dissonance
Alan Dean Foster
PG
Raiders of Gor
Raiders of Gor
John Norman
PG
Captive of Gor
Captive of Gor
John Norman
PG
Greetings from Earth
Greetings from Earth
Glen A. Larson; Ron Goulart
PG
The Cometeers
The Cometeers
Jack Williamson
PG
The Stone from the Green Star
The Stone from the Green Star
Jack Williamson
PG
Swamp!
Swamp!
Peter Tremayne
PG
In the Battle for New York, or, Uncle Sam's Boys in the Desperate Struggle for the Metropolis
In the Battle for New York, or, Uncle Sam's Boys in the Desperate Struggle for the Metropolis
H. Irving Hancock
PG