As far as I can tell you want to search for books containing only a single tag? If so, the following will do it for you:
tags:=Whatever AND tags:#=1
this searches for books with only a single tag that is Whatever.
See https://manual.calibre-ebook.com/gui.html#the-search-interface
for details.
As far as I can tell you want to search for books containing only a single tag? If so, the following will do it for you:
tags:=Whatever AND tags:#=1
this searches for books with only a single tag that is Whatever.
See https:/ /manual. calibre- ebook.com/ gui.html# the-search- interface
for details.