Creating an author index with Summary Blocks and/or archive/category/tags

I am trying in an easy way to create an author index with previously made tags and categories. I want it to look like this other website's author index: 

https://www.alicejamesbooks.org/search-authors

Squarespace doesn't allow tags/categories to work outside of blogs. I have attached (below) an example of tags and categories that I made for each issue but it doesn't really work like I want it to.

Here is the third party search engine I created instead which works great but my client doesn't like it.  There is a lot of content to go through if I was to make this traditional author index so am trying to save time to see if there is a work around that anyone knows?

https://www.aqreview.org/archive-author-index

Any help or advice would be appreciated or honesty like you are just going to have to do the work on the example of author index you have.

Thanks, TWSAlaska

It sounds like you want a list of authors linked to the category that you have assigned with the author's name, so for Ronald Spatz you would use this link:

https://www.aqreview.org/aqr-vol-36-number-3-and-4-winterspring-2020/category/Ronald+Spatz