I hope this isn't a repeat; I did search, but I may not be trying the right terms. I read fanfic, and I like to add a specific author ("AO3") to each one to help organize them in a different way from my published book downloads. so, after downloading a fic from AuthorX and one by AuthorY, I go into each one and change the author field to "AO3 & AuthorX" and "AO3 & AuthorY."
what I'm wondering is: is there a way to add "AO3" as an author (preferably first author, but adding at all would be a start) to both entries at the same time, without overwriting the current X and Y distinctions? that is, I want to add the AO3 author to each, but don't want to remove or alter the original author listing.
any help would be appreciated, and I'll try to clarify if anything's unclear.

thanks!