Categories
If we are uploading your ebook, we’ll need to know which category your book fits into. This is a VERY important step – it will determine where your book shows up on the various marketplaces. You are allowed to select a total of 2 categories on Amazon initially. But we can submit an additional 5 categories manually. It requires us to reach out to KDP support via your account and providing the correct hierarchy based on Amazon categories. Note: The categories for print are not the same as kindle (Kindle as far more).
Here's a helpful article from KDP on selecting categories.
I want to specifically point out:
To list your book in certain sub-categories on Amazon.com, you'll need to add specific search keywords to show up in specific categories.
Many of the categories below have sub-categories, so be sure to click through to see a list of subcategories and provide the subcategory you feel your book best fits into (we have to choose a subcategory if one exists).
For example, if your title is Fiction, there are many categories under fiction, some of when have multiple sub-categories like this:
FICTION > ACTION & ADVENTURE > SCIENCE FICTION > GENERAL
You must provide us the category list in the format above (Fiction > Action & Adventure > Science Fiction > General) to correctly place your title.
The best way to go about this is to review the 'Category Trees' starting with the print and eBook links provided here:
For the print edition, you can also use the standard categories used for books-in-print here.