Using Books as a category there is an Author attribute (item specifics). If a book has multiple authors, using just attr.value just prints the first one.
I would also like to auto pick English as Language, since its a required field. I hate that I have to click and find English. Wish you can just set a preference to English on all media inputs or whatever one wants to auto default to. 99% of our inventory is in English. Again a preference not mandatory since I know not everyone wants English. It would just make things faster. Thanks!
For that, you can most easily use a “stationery” listing, with some of the Attributes already set to defaults saved. Just duplicate that when you want to make a new listing.
Note this isn’t anything special about GarageSale; just create a partial listing and save it, and duplicate that. I keep the basic items in my inventory (“Old Book”, “Modern Book”, “Playbill” and so on) saved in a simple folder/group, and duplicate 20-30 of those when I am creating new listings of that kind of thing. They already have country of origin, category, language and so on set, but not dates or authors.
A quick way to do this is make a “Master Listing” and save it in your preferences as a check box under “copy all settings from this listing”. Then when you hit “New Ebay listing” OR command N, it automatically gets everything you put in the sample.