Hard SF
1307 booksThe best hard sf books in our directory, ranked by reader rating. Every title carries a content rating, age recommendation, and trigger warnings, so you know exactly what you're picking up before you start reading.
The New Adam
PG-13Liquid Diet
ROff on a Comet
PG-13Buried 5000 Years; Or, The Treasure of the Aztecs
PG-13Tom Swift and His Undersea Search
GThe Holy Terror
PG-13The Murder in Bethnal Square
PG-13Fell Purpose
PG-13The Secret of William Storitz
PG-13Adam's First Wife
PG-13Pantaletta: A Romance of Sheheland
PG-13The Spawning
PG-13A World of Her Own
PG-13City of Glass
PG-13The Invisible Man
PG-13The Cloud King of Oz
PGThe School for Crusoes
PG-132666
PG-13Eutopia
PG-13The Attack of the Aqua Apes
PG-13God of the Invincibly Strong Arms [3rd Series]
PG-13The Woman of the Pyramid
PG-13Heaven's War
PG-13The Middle Kingdom
PG-13Joan and Peter I: The Story of an Education
PG-13Blood Oranges
PG-13Meanwhile (The Picture of a Lady)
PG-13The Ring of Charon
PG-13Three Boys from the Moon; Or, The Strange Story of Will White
PG-13The Marvellous and Incredible Adventures of Charles Thunderbolt, in the Moon
PG-13