Dave at Kindle Entrepreneur There are some serious problems with it that you need to know about. 54% of the categories are duplicates of each other 27% of categories won’t allow you to be a bestseller for it, and you can’t even find the category page on Amazon - I call them “Ghost Categories” Amazon can remove you from categories, change them, and add you to more at their will - but there is a way to HELP your book with this
Or the print version here https://kindlepreneur.com/how-to-choose-the-best-kindle-ebook-kdp-category/