I had no idea what "Six Memos for the Next Millennium" were before clicking the link, but was pleasantly surprised to find that they are the work of Italo Calvino. Calvino's If on a winter's night a traveler is an absolutely incredible book.

Invisible Cities is another masterpiece.

Cosmicomics is also pretty great.

So is Marcovaldo.

All fantastic. If on a winter's night was the gateway for me, and I've been slowly getting into invisible cities, which is beautiful.

What's a good resource to learn more about the entity component system mentioned in the article?

Rust has a great ECS library with a lot of literature behind it. It's called specs.

Unity game engine.