How to tell if an author is a narrator

[Steven]

The web page for this shows an author and a narrator. However the API call only shows 2 authors and does not distinguish between authors and narrators. How do I tell which author from the api is actually an author and which is something else like editor, narrator, contributor, illustrator, or whatever other designation they might have?

[Ettore]

hey Steven, if doesn't look like the api is returning that info. I'm going to file a ticket to implement that. Differently from other cases, I have reasonable hope that we can address this soon. Not that I am guaranteeing anything, though. :)