By Kenna Hughes-Castleberry published 31 October 2025 From monsters to fungi to paranoia, our roundup of science fiction horror books is sure to give you the chills. Comments (0) ( ) When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works . (Image credit: Pixabay (aescdtle_art), Vintage, Picador, & Harper Voyager) Science fiction has a bit of something for everyone, from cutting-edge futuristic technology to doomed romances and strange aliens . The genre also crosses over very nicely into horror , because once humans start poking the unknown, it's only a matter of time before the unknown pokes back. This Halloween, step into stories where science meets terror, where contagions kill, landscapes devour explorers, and technology crushes the human soul. All of these books fit nicely into the sci-fi horror mold, and while some of them never make it into the depths of space, they're all well worth your time. Our list of sci-fi horror novels spans from 20th-century classics to modern masterpieces, all testing how far humanity goes before reason falters and horror takes over. Whether you're looking for a quick read or a deep dive, this roundup has a little something for everyone. Let's dig into our spooky roundup of the best sci-fi horror books. You may like Source: https://www.space.com/entertainment/space-books/best-sci-fi-horror-books