What's a good example of a really ancient book and/or novel? Like, Tale of Genji comes to mind, being arguably the first novel, but curious what other folks think of, too.

Le Morte d' Arthur seems like a good example, perhaps?

Context being trying to think of a good name for a package intended to work with old book formats, using the name of a famously old book as a cheeky nod to that usecase.

Ah, go many good suggestions! So many are already taken as package names...

Maybe a good opportunity to make creative and punny misspellings.

Oh, Callirhoe is a fun one, in that it's a novel that was more or less lost until it was reconstructed and published in the 1700s. That works great for something that goes into Arcalibre and supports obsolete e-book formats that otherwise don't have currently maintained third-party library support (e.g. CHM, LIT, Palmdoc, etc.).

My main concern would be that the plot seems to involve some misogynistic violence... but that might just be part and parcel of using old stories as names?

I mean, even the Tale of Genji, the oldest surviving novel written by a woman, has a fair bit of sexual assault in it. Naming shit is hard.
I said it as a shitpost, but I'm kind of leaning towards `epicgreg`. It's funny, but hopefully easy to remember even if you don't know the layered joke, it's not taken as a package name so far as I can tell, and is easy to spell.
@xgranade we have no idea what it means but it's easy to remember, yes

@ireneista In ffxiv, there's a character who mishears "Gilgamesh" as "Greg" and refuses to listen whenever he's corrected on it. The player base has taken to cheering on "Greg" whenever Gilgamesh is on screen.

It's all very silly.