The article identifies science-fiction books that, in different ways, brought important periods of the genre to a close. These endings range from final instalments in major series to works that signalled a shift away from older storytelling conventions, showing how science fiction continually changes with its audiences and times.

– The Ringworld Throne (1996): Larry Niven’s darker, more exhausted Ringworld novel is presented as the effective end of the series’ classic 1970s–80s era, despite later books in the wider Known Space setting.
– Leviathan Falls (2021): James S. A. Corey’s ninth Expanse novel concludes a decade-long space-opera saga, resolving central mysteries about the protomolecule, ring gates and their creators.
– Chapterhouse: Dune (1985): Frank Herbert’s final Dune novel became an unintended series endpoint after his death in 1986, closing some plotlines while leaving readers with a debated cliffhanger.