What is the primary audience of Julia novels?

It's impossible to say definitively who the "primary audience" of Julia novels is without knowing which author you're referring to. There are many authors named Julia, each with their own distinct style and target audience.

To help me give you a more specific answer, could you please tell me:

* Which author named Julia are you interested in? (e.g., Julia Alvarez, Julia Quinn, Julia Donaldson, etc.)

* What type of novel are you interested in? (e.g., romance, historical fiction, children's literature, etc.)

Once I have this information, I can give you a much better idea of the primary audience for those particular Julia novels.