Sorting by relationshp fields

[McSeem]

Hi, It's very cool that there is such a convenient tool for filtering data. In particular, I really liked the ability to filter by fields from the relationship table. But I'm trying to figure out sorting by related table. For example, there is the following databae structure:
Table books:
id,
title

Intermediate table book_authors:
id,
author_id

And table authors
id,
name

How can I sort books by author name from the linked table? Is such functionality supported in this tool like AllowedFilter?