From an existing wordpress free plugin that displays the last X articles of the author of the "currently read article", write some modifications:
1- Make it possible to work with any author, selected from the authors list in the plugin admin.
2- Add the profile picture and description (stored in the WP base) to the display.
That is all, 2 hours for a ph coder knowing wordpress!
Price is fixed $30. Not more, not less.