When humanity is ready to colonize space, we'll need a ship to help us survive the long journey to terraform distant habitable planets. That's where generation ship sci-fi comes in.

This subgenre usually takes place aboard a ship that will house would-be colonizers (sometimes also the last remnants of humanity) for generations, until they reach their distant destination.

eg. Starship by Brian W. Aldiss

Afrofuturism books explores themes from the Black diaspora to imagine liberated futures.

eg. The Fifth Season by N.J. Jemisin

Gene splicing, biotechnology, and unholy mergers between beast and man — welcome to the weird and wonderful world of biopunk.

Unlike cyberpunk, which harnesses familiar and often larger-than-life tech, biopunk often deals with hacking the invisible world, from viruses to DNA.

eg. The Windup Girl by Paolo Bacigalupi

Military sci-fi originated in the late 1800s and early 1900s, and explores the tech, politics, and philosophy of war across space and time.

eg. The Forever War by Joe Haldermam