Title, basically.
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Not sure about libre but I have used worldcat.org for this before.
There is also this project that is FOSS. But I have never used it before: https://bookbrainz.org/
I’m not sure that I understand your request (alternative as compared to…?), but I have used isbn.nu for many, many years now.
That, you put the ISBN and it gives you author, publisher and date data. I use it as a “librarian” in Bookwyrm/OpenLibrary.