query the results of a table function applied to all the rows of a different table

I have two tables:

book_table, primary key book_key.
book_authors, foreign key book_key

the function get_book_authors returns a set of rows from the book_authors_table given a book_key. Here's a sample query:

Now let's say that I have a third table, book_store, which has a primary_key book_store_key. The book_table references this table.

I'd like to get all the book_authors for a particular book_store, or for all the books in the book_table.

I tried but it's been deprecated as of 8.1.

Any ideas on how to do this?
Thanks

re: query the results of a table function applied to all the rows of a different table

Deprecated functions still work, but personally I would write a new function or SQL query for this.
The obscure syntax of mixing function call with a regular "select from" is not something I would normally use in the application.

re: query the results of a table function applied to all the rows of a different table

Ok, thanks. I was just curious whether this could be done with a single query.