Hard SF
1309 booksEvery hard sf book in our directory, with content ratings, trigger warnings, and age recommendations.
Close to Critical
Close to Critical
PGThe City and the Stars
The City and the Stars
PGDestination: Void
Destination: Void
PG-13The Jesus Incident
The Jesus Incident
PG-13The Lazarus Effect
The Lazarus Effect
PG-13The Ascension Factor
The Ascension Factor
PG-13Carve the Sky
Carve the Sky
RBrother to Dragons
Brother to Dragons
RBroken Symmetries
Broken Symmetries
PG-13The Broken God
The Broken God
PG-13Brain Wave
Brain Wave
PG-13Black Milk
Black Milk
PG-13The Black Flame
The Black Flame
GThe Black Cloud
The Black Cloud
PGBeyond This Horizon
Beyond This Horizon
PGBetween the Strokes of Night
Between the Strokes of Night
PGAt the Eye of the Ocean
At the Eye of the Ocean
PG-13Artifact
Artifact
RAnvil of Stars
Anvil of Stars
PG-13Altered States
Altered States
PG-13Against the Fall of Night
Against the Fall of Night
PGBeyond the Fall of Night
Beyond the Fall of Night
PGAgainst Infinity
Against Infinity
PG-13Jupiter Project
Jupiter Project
RAcross the Sea of Suns
Across the Sea of Suns
PG-133001: The Final Odyssey
3001: The Final Odyssey
PG2061: Odyssey Three
2061: Odyssey Three
PG2010: Odyssey Two
2010: Odyssey Two
PG2001: A Space Odyssey
2001: A Space Odyssey
PGThe Winds of Altair
The Winds of Altair
PG-13