Hard SF
1309 booksEvery hard sf book in our directory, with content ratings, trigger warnings, and age recommendations.
Tom Swift and His Wireless Message
G
The Family Trade
PG-13
Tom Swift and His Air Glider
PG
Tom Swift and His Sky Racer
G
Tom Swift and His Motor Boat
PGTravel Scholarships
Travel Scholarships
PG-13We, the Women
We, the Women
PG-13Talons of Scorpio
Talons of Scorpio
PG-13
World of Ptavvs
PG-13Young Frank Reade and His Electric Air Ship; or, A 10,000 Mile Search for a Missing Man
Young Frank Reade and His Electric Air Ship; or, A 10,000 Mile Search for a Missing Man
PG-13
Conversion Chronicles
PG-13
A Triumphant Entry
PG-13The Time-Hoppers
The Time-Hoppers
PG-13
Dueling Dragons
PG
Ride, Rebels!: Adventures of the Iron Scouts
R
Maiden Voyager
PG-13
A Journey to the Centre of the Earth
PG
The Dark Triangle
PG
North Against South
PG
Carpathian Castle
PG-13Junkie
PG-13
Death's Messenger
R
Dagger of the Mind
RInto the Darkness
Into the Darkness
PG-13Feast of the King's Shadow
Feast of the King's Shadow
PG
Kipton on Phobos
PG-13
The Apple Stone
R
The Obsidian Blade
PG-13Kil'n People
Kil'n People
PG-13
The Light of Lilith
R