Additional search filters for the literature section

Hello,

While browsing the literature section, I've noticed that there's only 4 fields for filtering.

For searching what I wanted (see how many books of my country are already on the database), I was thinking about adding the fields “country of publication” and “language” (maybe).

What other filters could we add for searching books?

Thanks.

Totally agree ! I suggested something similar here : https://fr.numista.com/forum/topic159067.html