The keyboard shortcut ALT+A show all books by the same author as the current selected book.
But if more than one entry is selected, the search is performed only on the first entry even if there are different authors in my selection.
AT+A generates a search command like
authors:"=Authorname_item 1"
It would be cool if the search could be expanded in a way like
authors:"=Authorname_item 1" or authors:"=Authorname_item 2" or authors:"=Authorname_item 3" ...
Maybe is there any kind of tweak in Calibre enabling that possibility ?

It would be a great help to me.
Regards
Sisela