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

Book2019

Null Set

A Cas Russell Novel

S. L. Huang

4.0(1)Open Library rating out of 5

Book2008

Null-A Continuum

Continuing A. E. van Vogt's World of Null-A

John C. Wright

4.0(1)Open Library rating out of 5

Book1985

Null-A Three

A. E. van Vogt

4.0(1)Open Library rating out of 5

Space exploration1969

Null-Frequency Impulser

James Nelson Coleman

4.0(1)Open Library rating out of 5

Book1995

Numbers in the dark

and other stories

Italo Calvino

4.0(1)Open Library rating out of 5

Robots & androids1970

Nunquam

Lawrence Durrell

4.0(1)Open Library rating out of 5

Book1975

Nutzenbolts and more troubles with machines.

Ron Goulart

4.0(1)Open Library rating out of 5

Book2004

Nylon Angel

Marianne De Pierres

4.0(1)Open Library rating out of 5

Book2005

Nylon Angel (Parrish Plessis Novels)

Marianne de Pierres

4.0(1)Open Library rating out of 5

Space exploration2017

Nyxia

Scott Reintgen

4.0(1)Open Library rating out of 5

Nyxia Unleashed

The Nyxia Triad

Scott Reintgen

4.0(1)Open Library rating out of 5

Book1998

O Pioneer!

Frederik Pohl

4.0(1)Open Library rating out of 5

Book1986

O-Zone

Paul Theroux

4.0(1)Open Library rating out of 5

Dystopian worlds2025

Oasis

Guojing

4.0(1)Open Library rating out of 5

Book1983

Oath of the Renunciates

the shattered chain, Thendara House

Marion Zimmer Bradley

4.0(1)Open Library rating out of 5

Book2019

Obsoletes

A Novel

Simeon Mills

4.0(1)Open Library rating out of 5

Book2016

OCDaniel

Wesley King

4.0(1)Open Library rating out of 5

Book2015

Ocean

Orbiter

Warren Ellis

4.0(1)Open Library rating out of 5

Time travel2018

Ocean of Minutes

Thea Lim

4.0(1)Open Library rating out of 5

Book1994

Ocean Under the Ice

Robert L. Forward

4.0(1)Open Library rating out of 5

Space opera2022

Ocean's Echo Sneak Peek

Everina Maxwell

4.0(1)Open Library rating out of 5

Oceans Between Stars

Kevin Emerson

4.0(1)Open Library rating out of 5

Book2002

Oceans of space

Brian Thomsen; Martin H. Greenberg

4.0(1)Open Library rating out of 5

Space opera2000

Oceanspace

Allen M. Steele

4.0(1)Open Library rating out of 5