I came across the below passage in a book,
This is not outlier behavior; it’s instead the new normal. When the novelist Jonathan Franzen wrote a piece for the Guardian calling Twitter a “coercive development” in the literary world, he was widely ridiculed as out of touch. The online magazine Slate called Franzen’s complaints a “lonely war on the Internet” and fellow novelist Jennifer Weiner wrote a response in The New Republic
In this statement, author used an article with "novelist" the first time ("When the novelist Jonathan Franzen") but did not use any article the second time ("and fellow novelist Jennifer Weiner").
Is there any reason why the article is excluded the second time?