I don't follow. This is how the Library of Congress catalogs books. That is the truth in the data. I don't see the problem with having a category for books o

I don't follow. This is how the Library of Congress catalogs books. That is the truth in the data. I don't see the problem with having a category for books on Central Europe in general and another section for individual countries that happen to be in Central Europe. Some books cover general topics and others specialize. Shouldn't we expect datasets that describe the content of books to reflect this?