I'm currently working on my own master json file and thought this might be useful for anyone else attempting to map out their own list of genres/tags.
They're just meant as a starting point for anyone who wants to make a custom list of tag mappings from scratch. These aren't plug and play lists.
If you don't know how they'd be useful to you, they won't be
The genre genrelistnested.txt file is a list of all the tags (745 of them) currently on the http://www.goodreads.com/genres/list
pages in nested form (minus a couple non-English tags that Notepad mangled).
The genres.txt is an unnested and unprocessed version of the same list of genres.