I originally started as just a Pen Name, but later used the column for a list of Authors in books with more than 3 (I was using a file path based reader at the time). I still use this today: I put the Editors name [ Editors Name (ed) ] or (My fav) prime Author into {authors} and the full authors list into {#pseudo4} (remember the names are separated by a & )
Image 0 is the custom column setup <this shows in the Tag Browser
Image 1 is the Grouped Search setup
Image 2 is the Similar books setting
The only thing missing is the ability to use the Authors database contents as a simple lookup for this column. (the ugly work around is a fake book with all authors needed

)
BTW I use the same theory for 2nd Series that bridge (I don't worry about any more than 2: <Various> becomes the 2nd entry when that happens