KDP categories are the shelves your book sits on in Amazon's store. When you set up a book in KDP, you choose three of them, and KDP's help says those categories, along with your keywords, tell Amazon where to shelve your book. The rules are short, and all of them sit on KDP's own help pages. Here they are in one place, checked against KDP's help in October 2026, with a way to research your three using nothing but Amazon's store.
The quick answer
- Three categories. KDP's help says you can select 3 categories when you create a book. You choose them on each format's details page.
- Picked from KDP's list. The list depends on your primary audience and primary marketplace, so KDP asks you to review those two settings first.
- The list varies. Some categories aren't available for every format, and each Amazon marketplace has its own categories.
- Accurate, not clever. KDP may remove or change a category that doesn't match your book, and it does not tolerate categories chosen to mislead readers.
- Changeable later. You can update categories after publishing. KDP says it can take up to 72 hours for your book to show in the new ones.
What KDP categories are
KDP describes categories as digital shelves that organize books by genre and topic, the way sections do in a physical bookstore. Each one is a path that starts broad and narrows. KDP's own example is a historical romance set in Victorian England, which might go on these three:
- Fiction > Historical Fiction
- Fiction > Romance > Historical Fiction
- Fiction > Literary Fiction
Readers browsing for historical romance or Victorian-era fiction are then more likely to find the book, KDP explains. In KDP's category window, you click your way down the path: category, then subcategory, then placement.
Shoppers meet categories in two places. They browse them as sections of the Kindle Store and the Books store. And on a book's Amazon page, the Product details section shows its Best Sellers Rank: an overall rank, then its rank within store categories, each name a link to that category's best sellers list.
KDP's help adds a note: its support team can't give you specific recommendations or strategies for picking book categories. The choice is yours, and the rest of this guide is there to help you make it.
KDP categories vs keywords
Categories and keywords do different jobs, and KDP's help ties them together. Categories are the shelves shoppers browse. Keywords match the words they type into search.
| Detail | Categories | Keywords |
|---|---|---|
| How many | 3 | Up to 7 |
| What they match | Shelves shoppers browse | Words shoppers type into search |
| How you enter them | Picked from KDP's list | Typed in your own words |
| Seen by shoppers | Yes, as store sections and in Best Sellers Rank | No |
| Set for | Each format | Each format |
| KDP's main rule | Describe the book; never chosen to mislead | Describe the book; leave out words already in your title or categories |
Two rules connect them. KDP's keyword help lists words already in your categories among the things to leave out of your keywords; its example is 19th Century History. And when you can't find a specific category for your book, KDP says keywords can help Amazon decide how to shelve it, because keywords are often more specific. Here is how to choose your seven KDP keywords.
Where to see the full KDP categories list
KDP's help doesn't print the list. It says each Amazon marketplace has thousands of book categories and that they can change over time. You can see them in two places.
In KDP, on your book's details page
On the Details tab for a format, find the Categories section and click Choose categories or Edit categories. A new window opens with the categories you can choose. KDP's metadata guidelines say you choose from a list based on your primary audience and marketplace, and that you must select a primary marketplace before you can select categories at all.
On Amazon, in the store itself
KDP's categories help links each marketplace's stores: the Kindle Store for eBooks and the Books store for print. Open the one for your format in your primary marketplace, click Categories in the top navigation, and filter down to subgenres. This is the better place to research, because you can see the books already on each shelf.
A list copied out of Amazon and posted somewhere else can go stale. KDP says Amazon updates its book categories from time to time, and if a new category hasn't reached KDP yet, you may have to wait for KDP's options to update. Treat KDP's category window as the final word on what you can choose. Some authors also pay for category research tools. KDP's categories help doesn't mention them, and Inkbound has no sales or rank data, so this guide sticks to the method KDP describes.
How to choose your three KDP categories
KDP's categories help gives three tips:
- Research your genre. There are lots of subgenres within a genre. Look through Amazon and other bookstores, see where similar books are categorized, and decide whether your book fits there.
- Pick accurate categories. Choose categories that describe your book. Irrelevant ones, KDP says, create a poor shopping experience for readers.
- Balance popularity and relevance. Aim for categories popular enough to have reader interest, but not so broad, or so specific, that your book gets lost.
KDP's metadata guidelines draw a sharper line: avoid categories that aren't relevant to your book's central storyline. A subplot doesn't earn a shelf.
Here is that advice as a routine. The steps are our suggestion; the rules inside them are KDP's.
- Set your audience and marketplace first. On the Details tab, check Primary Audience and Primary Marketplace before you open the category window, as KDP asks. They decide which categories you're offered.
- Gather a handful of comparable books. Choose books a reader of yours would also buy, in the same format as yours, and recent enough to reflect today's shelves.
- Read their Best Sellers Rank. On each book's Amazon page, scroll to Product details and note the categories listed under Best Sellers Rank. Names that come up for several of your books are worth a closer look.
- Walk each shelf. Click a category name to open its best sellers list. Would your reader browse here? Would your cover look at home among these books? If the shelf is full of books unlike yours, cross it off.
- Test each one against KDP's rules. Keep only categories that describe your book's central storyline or main subject. Drop any that would surprise a reader who found the book there.
- Balance the three. KDP's example shows a useful shape: a main genre shelf (Historical Fiction), a narrower one where the book's closest readers look (Romance > Historical Fiction), and one that reaches readers from another direction (Literary Fiction). All three are true to the book.
- Find them in KDP for each format. Look for the same paths in the category window on each format's details page. If one isn't offered there, choose the closest match.
For nonfiction, the same thinking points at the subject rather than the genre. A book about one topic belongs on the shelf for that topic, where someone looking for it would browse, and not only on the broad shelf above it.
A category is a promise about what's inside. Choose the shelves where your reader would be glad to find the book.
eBook and paperback categories
Your eBook, paperback and hardcover each have their own details page in KDP, so you set categories separately for each one. And the lists aren't identical: KDP says some categories are not available for every book format, with eBook versus paperback as its example, and that categories also differ by marketplace, such as Amazon.com versus Amazon.co.jp.
KDP's advice when the lists don't line up is to focus on your primary marketplace and, where needed, pick the best-matching category for each format. In practice:
- Research each format in its own store. KDP's help sends you to the Kindle Store for eBook categories and to the Books store for print.
- Keep the shelves close. When a path exists for both formats, use it for both. When it doesn't, choose the nearest match rather than a different kind of shelf.
- Check each format after it goes live. Look up each edition on Amazon once the new categories have had time to show.
Children's and teen categories
For a children's or teen book, two settings in the Primary Audience section decide which shelves are open to you.
- The sexually explicit question. KDP requires a Yes or No before you can select categories. Answering Yes makes the book ineligible for Children's categories, and you can't set a reading age.
- Reading age. The field is optional, but KDP says a children's or teen book without an appropriate reading age may not be eligible for those categories. For Children's categories, KDP lists the ranges 0 to 2, 3 to 5, 6 to 8 and 9 to 12. For Teen & Young Adult categories, it says to set a reading age between 13 and 17. On Amazon.de, KDP notes, Teen & Young Adult categories are set between 12 and 15.
Changing your KDP categories later
Categories are on KDP's list of details you can update after publishing, for the eBook and for print. KDP's steps:
- Go to your Bookshelf and click the ellipsis button next to the book.
- Choose Edit details for the format you want to change.
- On the Details tab, check your Primary Audience and Primary Marketplace.
- In the Categories section, click Edit categories. A new window opens.
- If you already have three, click Remove next to the one you're replacing.
- Pick the new category, subcategory and placement, then save and submit the book for publication.
KDP reviews the change, and it says your book can take up to 72 hours to appear in its new categories. Its timelines page adds that when categories change, sales rank updates can take up to a week to show on the website. Two timing limits apply. You can't update a book while its status is In Review or Publishing. And for an eBook on pre-order, KDP's timelines page says you can't update book details within 72 hours of the release date.
A practical habit: keep a note of the paths you chose for each format. Amazon updates its categories from time to time, and a note makes it easy to see what changed.
When your book doesn't show in a category
KDP's help lists the common causes:
- Too soon. Placements in new categories can take 72 hours to show.
- The category changed. Amazon updates its book categories from time to time, which can change your book's categories.
- An explicit flag. Books with sexually explicit images or titles are removed from categories such as Children's and Young Adult.
- A mismatch. If a category is unrelated to the book, KDP may remove or change it. Its example is a book about Canadian national parks placed in a Science Fiction category.
KDP's content guidelines also say it reserves the right to change a book's categories at any time to keep the shopping experience a good one.
Common KDP category mistakes
- Opening the category window before setting audience and marketplace. They decide which categories you're offered, so KDP asks you to review them first.
- Shelving by a side plot. KDP's metadata guidelines say to avoid categories that aren't relevant to the central storyline.
- Choosing a shelf to game it. KDP says it does not tolerate categories selected to mislead or manipulate customers, and it reviews category changes.
- Repeating category words in your keywords. KDP lists them among the keywords to avoid, so those boxes are better spent on something else.
- Skipping reading age on a children's or teen book. Without it, the book may not be eligible for the categories you chose.
- Researching in the wrong store. eBook categories are in the Kindle Store and print categories are in the Books store, and each marketplace has its own.
Your categories in Inkbound
In Inkbound, categories live in the Listing, beside your description, keywords and ISBNs.
- Three slots. A counter shows how many of the 3 you've filled, and a note reminds you that KDP lets you choose up to three and that the final pick happens in KDP. Write each one as a path, such as Fiction > Literary.
- Paste a list. Paste your paths on separate lines into any slot, and they fill that slot and the ones after it. List numbers, bullets and surrounding quotation marks come off as they go in.
- A check before you upload. Publish counts a category among the things your book needs before it's ready.
- Someone to think it through with. The Publishing Coach, one of the AI staff, will talk through your category choices in the team chat. It uses AI credits, and the decision stays yours.
Inkbound doesn't choose categories for you, doesn't connect to KDP's category window and has no sales or rank data. The slots are where you note the paths you settled on. Then you pick them in KDP's category window on each format's details page, from your own KDP account. Inkbound's publishing tools prepare the files and the listing you take there.
The rest of the listing has its own guides: how to write a book blurb for your description, KDP keywords and A+ Content. Step 6 of how to self-publish a book on Amazon KDP walks through every field in order.