The Time Traveller's Wife
★★★★☆
Henry has a rare condition which causes him to randomly jump in time, to various places in either the past or future
Though science fiction and fantasy are often considered two sides of the same (speculative fiction) coin, sci-fi is distinguished by its preoccupation with real or real-feeling science. Lots of sci-fi is set in the distant future, which makes it a seedbed for stories about time travel and space exploration.
The Chrysalids
★★★★☆
A community in a post-apocalyptic world strictly defines what it means to be human, and roots out any deviations as abominations
Flatland: A romance of many dimensions
★★★★☆
An brief and entertaining mathematical satire, where a 2-dimensional being encounters a 3-dimensional one
The Dark Tower 2: The Drawing of the Three
★★★★☆
The gunslinger travels to New York, in our world, and enters the minds of three different people at different times
A Scanner Darkly
★★★☆☆
In a dystopian future, drug culture and use have been normalized and taken over the mainstream
The Demolished Man
★★★★☆
From the golden age of sci-fi, the very first ever Hugo award winner is a police story in a telepathic world
Dark Matter
★★★★☆
A married college physics professor is drugged and wakes up in an alternate world, where he is a successful single scientist
Relentless
★★★★☆
Geary is within touching distance of Alliance space, but has to deal with the fleet saboteurs and the Syndic reserve flotilla
The Lost Fleet: Courageous
★★★☆☆
The Lost fleet is wounded; all ships need more ammo, more repairs and more supplies. And Geary is made aware of the presence of another threat...
The Lost Fleet: Fearless
★★★★★
Geary has to deal with a self-aggrandizing captain who leads a mutiny, and also with syndics attempting to blow up a hypernet gate