Oh, hm, ISBN is probably better? These guys seem to have a DB, wonder how they get it? https://isbnsearch.org/ https://isbnsearch.org/ It used to be that auth

Oh, hm, ISBN is probably better? These guys seem to have a DB, wonder how they get it? https://isbnsearch.org/ https://isbnsearch.org/ It used to be that authors needed to deposit a copy of every new book at USLC, that's probably an old thing.