Show HN: A tool for finding the top-rated Goodreads books in each genre

Where are you getting your list of genres from? It looks like you are missing many of the ones supported by goodreads at https://www.goodreads.com/genres Not to mention all the ones people create by creating shelves.

I'd suggest lowering the default for number of ratings from 50k to something like 4k, so you'll pick up relatively newer books that are popular but don't have a lot of ratings yet.