There is no antimemetics division is a novel / series of short stories / piece of collaborative fiction authored by qntm. The entire work is readable for free online. It is vaguely unsettling horror --- not my usual preference --- but excellently written and with a compelling premise.
There is no antimemetics division lives inside SCP, a huge online collaborative fiction site loosely based around a single fictional prompt and set in roughly the same universe. If you read widely on the SCP site, you will eventually find some mutually-incompatible storylines; these are explicable under the premise of the universe: the site documents a sort of parallel reality (or is it) where certain ideas have the power to erase themselves from your memory. These are "antimemes", and they can propagate just like memes but are much more difficult to secure, contain, and protect against (SCP).
I don't usually enjoy horror, but this novel and the SCP project more widely are very gentle about the horror angle. If you go looking to be scared, you can find that --- but there are also storylines that are 100% playing the premise for comedic value, entire stories based around one pun punchline, and nudge-nudge-wink-wink stories that play with the tropes of horror joyfully. Spending many hours reading this novel, and various other SCP works, convinced me that I'm actually OK with horror, as long as it is psychological and interspersed with jokes. SCP is more like Jasper Fforde's sense of humor, melted with Peter Watts' attitude and then forced to write exclusively in the format of bureaucratic filing reports.
Rereading the above, my opinion might not be clear. I'm trying to be descriptive.
I strongly recommend There is no antimemetics division. Try the first few chapters and see if they scratch a particular brain itch for you, as they did for me. If you like the premise, then I hope you've already read Peter Watts' Blindsight (GO READ IT RIGHT NOW, it remains my #1 most-recommended-to-others book).
This post's theme word is descript (adj), "having distinctive features or qualities." This novel made me much more cognizant of the aggressively descript and nondescript elements of my environment.