"In diesen Rubriken gibt es keine Bücher."
"column" was not accepted for this sentence, even though it was elsewhere. What kind of column or category is Rubrik referring to generally?
Column would refer to a news article which could be seen as regularly belonging to a specific category. Such a column could be called a "Rubrik" in German.
The common use of "Rubrik" is category, and only this meaning applies to books.