They link to this website in the article. It has a list of some of the more well known works:

https://web.law.duke.edu/cspd/publicdomainday/2023/

I wonder why it's so difficult for some to understand that liking books comes down to nothing but taste. Hating a book or loving another book, doesn't make you better than anyone else. Trashing something that others enjoy doesn't make you better than them. Just let people read what they want to read and stop the shaming already. I wish the mods would just ban posts about Colleen Hoover. Every day there's a new person who thinks they're the first to say this. You're not.

While I think dog-ears in a book are awful (as I like to treasure my things and keep them in good condition), everyone can do with their own books what they like. Dog-ear away if it makes you happy.

But imo it takes a special kind of asshole to damage books you don't even own.

If you search the r/Fantasy subreddit for slice of life you'll find a ton of threads with recommendations.

Example: https://www.reddit.com/r/Fantasy/comments/s9kni7/sliceoflife_lovers_hear_my_call/