How KDP Categories Actually Work
You're not limited to the 2 categories you pick during setup. Here's the part most publishers never find out about, and how to actually pick categories that help.
The part most people miss: you can request additional categories after publishing by contacting KDP support directly, often up to 10 total, including categories that aren't selectable in the standard picker at all.
The 2 you pick at setup
During title setup, KDP's category picker only lets you choose 2. These are the ones you can select yourself, searchable right in the dashboard.
The rest, via KDP support
Amazon's full category tree goes much deeper than what's selectable in the picker. Once your book is live, you can contact KDP support with the exact category path you want and ask them to add it. This includes categories that never appear in the standard picker at all, sometimes called hidden categories.
Broad vs. specific
Specific, lower-level categories usually have far less competition, which makes it realistic to actually rank on a bestseller list there. Broad top-level categories get more traffic but are much harder to break into. Most publishers do best picking a mix, one broad category for visibility, and specific ones where ranking is actually achievable.
Common questions
How many categories can I pick on KDP?
2 during setup, but you can request more from KDP support after publishing, often up to 10 total.
What is a hidden category on KDP?
A category that exists in Amazon's full tree but isn't selectable in the standard picker. You get access by contacting KDP support with the exact category path after your book is live.
Should I pick broad or specific categories?
Specific categories are easier to rank in due to less competition. Broad ones get more traffic but are much harder to break into. A mix of both usually works best.
Why this matters
Two categories is genuinely limiting for discoverability. Sending a hidden category request is a five-minute email that most self-publishers never send, simply because they don't know it's an option.
KDP Workspace tracks which categories you've picked and which hidden-category requests you've sent, per book, so nothing falls through the cracks across a growing catalog.
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