to add comments, rating stars, excerpt and genres section

Hi,

I used your wonderful plugin, I need to add 3 things on my theme (Author Pro):

1. Adding comments to books pages because I need the visitors to tell me their opinions.

and if it can be to suggest a good plugin to put rating starts with comments.

2. Adding the excerpt below books in the Library or the front page.

3. Adding Taxonomy to Author Pro like this:
https://wpsites.net/wordpress-themes/add-taxonomy-to-author-pro/

In other words, How I add genres section to the plugin?

Thanks a lot,

Tamer