Wrong author (maybe)

[Rafael]

This book is an adaptation from this book (https://www.goodreads.com/book/show/1...) but the oruinal author is not in the cover or in the edition data. He must be? What must be his role?

[Ayshe]

I don't think this has been set in stone (or the Librarian manual) yet. I found these on the subject
https://www.goodreads.com/topic/show/...
https://www.goodreads.com/topic/show/...
and it seems you could use "Original author", but it's more important to add Adaptor to the primary one :) for reducing the temptation for newer or less clueful Librarians to well-meaningly move the "Original Author" back to the top slot incorrectly

[Rafael]

I did like you suggested. Thank you.

[rivka, Former Moderator]

Ayshe wrote: "I don't think this has been set in stone (or the Librarian manual) yet."

Because the role assigned to the original author is not that important (or even necessary). But the adaptor's is. Added for both editions.