How is correct to say:
- This book was written by the French author Michel Hope.
- This book was written by French author Michel Hope.
I know that that is called restrictive appositive, but I have observed that some people drop the definite article before names of people with some modifiers, and others don't.
For example: "Psychologist Mike Manson phoned me this morning," or "The psychologist Mike Manson phoned me this morning."