It's that time of year!
Public domain is part of the copyright jungle. Easy to get entangled.
As for books, I do not like reading on screens, so I have sometimes bought printed books in the public domain. Mwhaha!
Best stop for public domain information is Public Domain Review. They have not yet (in the morning!) published an article on it, but one can read this https://publicdomainreview.org/features/entering-the-public-domain/2023/ .
Duke University has a good list, in a charming 90s web design. https://web.law.duke.edu/cspd/publicdomainday/2023/
Wikipedia has long lists of works entering PD for each year and zone.
I rarely show my face - a work of beauty - on the web, but it is copyrighted.
Some works in Public Domain are younger than me. The question is if they are fresher than me?