A couple of missing ones (that I expected to have been mentioned, aren't there as far as I can tell, and I found them on here with a quick google):
https://en.wikipedia.org/wiki/The_Invention_of_Morel mentioned here https://news.ycombinator.com/item?id=28779266 I'd have expected it to come up as one step removed from Borges, and it did.
https://en.wikipedia.org/wiki/Why%27s_(poignant)_Guide_to_Ru... mentioned many times, eg https://news.ycombinator.com/item?id=36632010 - a surprising omission, tho I guess it's not in print.
I just read The Invention of Morel and can recommend it — unsettling, and smart. In general the approach of reading authors who were beloved by or respected by or inspirations for the authors we remember today (Borges in this instance) is quite fruitful.
Thanks! Why's (Poignant) Guide is in now: https://hackerbooks.org/#/book/OL22247013W (it wasn't in Open Library, so it needed a manual entry). The Invention of Morel: only ~3 people have mentioned it in all of HN, and yes, looks like we're missing some long-tail titles due to how the matcher works. Needs more thought to fix it while keeping the noise low.