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Balanced rating combines the average and the number of ratings; small samples carry less weight. How ranking works ↗

Book2016

Old Man's War Series 1-6

John Scalzi

4.0(1)Open Library rating out of 5

Artificial intelligence2005

Old Twentieth

Joe Haldeman

4.0(1)Open Library rating out of 5

Book2015

Old Venus

George R. R. Martin; Gardner R. Dozois; Gardner Dozois

4.0(1)Open Library rating out of 5

Book2005

Olympos

Dan Simmons

4.0(1)Open Library rating out of 5

Omega

Jack McDevitt

4.0(1)Open Library rating out of 5

Book2003

Omega Expedition

Brian Stableford

4.0(1)Open Library rating out of 5

Omega games

a StarDoc novel

S. L. Viehl

4.0(1)Open Library rating out of 5

Robots & androids1983

Omega Station

Alfred Slote

4.0(1)Open Library rating out of 5

Omnivore

Piers Anthony

4.0(1)Open Library rating out of 5

On a beam of light

Gene Brewer

4.0(1)Open Library rating out of 5

Dystopian worlds2014

On a Clear Day

Walter Dean Myers

4.0(1)Open Library rating out of 5

Book2014

On Her Watch

Rie Warren

4.0(1)Open Library rating out of 5

Book1991

On Stage

A Chrestomathy of His Plays

Ray Bradbury

4.0(1)Open Library rating out of 5

Book1980

On strike against God

Joanna Russ; Alec Pollak

4.0(1)Open Library rating out of 5

Book1991

On the road to Baghdad

a picaresque novel of magical adventures, begged, borrowed, and stolen from the thousand and one nights

Guneli Gun

4.0(1)Open Library rating out of 5

Space opera2024

On Vicious Worlds

Bethany Jacobs

4.0(1)Open Library rating out of 5

Book1979

On Wings of Song

Thomas M. Disch

4.0(1)Open Library rating out of 5

Book1999

Once a hero

Elizabeth Moon

4.0(1)Open Library rating out of 5

Book2019

Once and Future

Cori McCarthy; Amy Rose Capetta

4.0(1)Open Library rating out of 5

Book1999

Once I was...

Nikia Speliakos Clark Leopold

4.0(1)Open Library rating out of 5

Book1971

Once There Was a Giant

Keith Laumer

4.0(1)Open Library rating out of 5

Book2002

Once upon a galaxy

Wil McCarthy; Martin H. Greenberg; John Helfers

4.0(1)Open Library rating out of 5

Time travel1993

Once upon a time in the East

Lionel Fenn

4.0(1)Open Library rating out of 5

Book2013

Once We Were

Kat Zhang

4.0(1)Open Library rating out of 5