Farah 🖖🏼🧶🏳️🌈‘I’d like to read a sci-fi book that’s not part of a series’ challenge
Update: I've compiled a list from this thread from all of your suggestions and put together a CSV file, so you can access it to your liking. You can directly import it to your Goodreads' "want to read" shelf. (If you use another book tracking service, I'm sorry). Have fun and happy reading! https://drive.google.com/file/d/1ZLIhE8pQlfHcwtG1rgKfCNZu4oE1uHHb/view?usp=sharing
So‑Called Vaughn
Medea Vanamonde🏳️⚧️ ♀
Moosey 
I'm seconding Ghalgren, or anything my Samuel Delany
MrC@farah
"Do Androids Dream of Electric Sheep?" Philip K Dick
And
"Down and Out in the Magic Kingdom" Cory Doctorow
Come to mind
@ScotttSee Actually picked up PKD before reading your reply! Wise minds etc etc
@farah
A Canticle for Leibowitz by Walter M. Miller
A Canticle for Leibowitz by Walter M. Miller
Glyph
Jim. From Kansas.@farah Lord of Light by Roger Zelazny.
AN/CRM-114@farah Against a Dark Background and Feerrsum Endjinn are both standalone non-Culture Iain M. Banks novels, I hope there was no sequel to Nightfall by Asimov and Silverberg. Redshirts by Scalzi
Max™@flyingsaceur @farah ooh nightfall is a great one
China.Gamer.Guy 神州电玩游士
Shawn Kilburn
Peter van Dijk@farah Kim Stanley Robinson - Aurora
Like many other replies, I found it in a bookshop after rejecting several parts of series
A Vernal PoolSome of these are new, but don't appear to have sequels imminent:
Gods, Monsters, and the Lucky Peach, by Kelly Robson
The Vanished Birds by Simon Jimenez
The Jinn-Bot of Shantiport by Samit Basu
The Terraformers by Annalee Newitz
Nalo Hopkinson, Karen Lord, and John M. Ford all have a number of stand-alone SF novels
The Lathe of Heaven by UK LeGuin, also Always Coming Home is technically SF
Jenny@farah Cosmos - Carl Sagan :)
Sci-fi books
Amber Or Bust@farah It IS hard to come up with standalone novels! Some favorites: Accelerando (Charles Stross); The End of Eternity (Asimov); The Gods Themselves (Asimov); Beyond the Barrier (Damon Knight); Ring Around the Sun (Clifford D. Simak).
garland@farah Most of Neal Stephenson’s books are stand-alone, if epic in length. The Diamond Age and Snowcrash are books I particularly liked.
@farah
Good Morning, Midnight by Lily Brooks-Dalton
Good Morning, Midnight by Lily Brooks-Dalton
@farah
To Be Taught, If Fortunate by Becky Chambers
To Be Taught, If Fortunate by Becky Chambers
@farah
The Mountain in the Sea by Ray Nayler
The Mountain in the Sea by Ray Nayler
Iris Young (he/they/she) (PhD)@farah LeGuin has some. Some of hers are series and some are standalone.
@farah Fuzzy Nation by John Scalzi
@farah anyway I hope recommendations were welcome. I wasn’t trying to disprove your hypothesis. I just like sci-if books and like sharing the ones I’m excited about.
@garland Yes! Thank you!! Book recommendations are always welcome
Andy Herd@farah To Be Taught, If Fortunate - Becky Chambers
(it’s a short novella, set many light years from earth which means that any news is years/ decades out of date)
Skjeggtroll"Embassytown" by China Miéville
I also thought "Passage at Arms" by Glen Cook was standalone, but checking I see it's technically part of the 'Starfishers' universe. Still, it works perfectly well as a standalone.
For books that were written as standalones but gained sequels after the fact, 'Neuromancer' by William Gibson and 'The Pride of Chanur' by C. J. Cherry comes to mind.
-dsr- (not a dog)The Knife and the Serpent, Tim Pratt. Multiverse done properly.
Unwillingly to Earth, Pauline Ashwell. Episodes in social engineering.
Mastodonia, Clifford Simak. Time travel done kindly.
Kim Possible 
@farah AND I want it to be crystal clear on the cover, in the title, whatever, that it is not a standalone.
FoolishOwl@farah I'm sitting on dozens of unread short fiction anthologies, so I want to move to novels from the other direction.
Immodestmouse@farah The Chrysalids of by John Wyndham afaik