Copyright law varies by country, so works that are freely available in one country are not necessarily so in others. To give you a hint of the complexities, in the U.S. there have been two major changes to copyright law since the 1970s: Works published before 1978 are now protected for 95 years from publication, but those published after 1978 are generally protected for the author's life + 70 years. Eventually, this will bring U.S. copyright law broadly into line with Europe, where most countries recognize life + 70 years, but will leave both Europe and the U.S. with much longer copyright periods than most countries in Africa and Asia, where books generally enter the public domain 50 years after an author's death.
You can see more books entering the public domain in 2022 at publicdomainreview.org.
With best wishes for the new year,
Davina Morgan-Witts,
BookBrowse Publisher