How to Choose the Right Book Categories on Amazon
Categories decide which bestseller lists you can win — and how easily readers find you. Here’s how to pick them strategically, not randomly.
Most authors treat Amazon categories as an afterthought — a couple of dropdowns to fill in before hitting publish. That’s a mistake. Your categories decide which bestseller lists you can realistically rank on, which “Also Boughts” you appear in, and how discoverable your book is. Choosing them strategically is one of the highest-leverage, lowest-effort moves in self-publishing on KDP.
Why category choice matters so much
Amazon ranks bestsellers within each category, not just overall. A book that would never crack the top 100 books overall can easily become a #1 Bestseller in a tightly defined sub-category — and that orange bestseller badge is real social proof that lifts conversions. The trick is picking categories you can actually win.
Aim for relevant but less-competitive niches
The instinct is to choose the biggest, broadest category. Resist it. “Business” is a bloodbath; “Business > Small Business > Home-Based” is winnable. The best category is the most specific one that still genuinely fits your book and has real readers. You want the sweet spot: relevant enough that browsers who land there want your book, small enough that a modest sales spike lands you on the list.
How to research the competition
- Browse the category live. Look at the current #1–#20. Check their Best Sellers Rank (BSR) — if the #1 book has a BSR around 20,000–50,000, the category is beatable for a new release.
- Read the top books’ reviews. Are they polished, well-covered titles or thin ones? A category full of weak books is an opportunity.
- Match intent, not just topic. Make sure browsers in that category actually want a book like yours.
Use keywords to unlock hidden categories
Amazon assigns some categories automatically based on your seven backend keywords. Certain niche categories can only be reached through specific keyword phrases. Research the exact phrases that map to the sub-categories you want, and work them into your keyword fields and description. This is where category and keyword strategy overlap — treat them as one system.
Ask Amazon for more categories
KDP lets you select a limited number of categories at upload, but Amazon can place a book in up to ten. If your book legitimately fits more, you can request additional category placements through KDP support. More relevant categories means more shelves your book sits on and more chances to earn a bestseller badge.
Don’t game it — fit it
One warning: choosing an irrelevant category just because it’s easy to rank in backfires. Readers who land there won’t buy, your conversion drops, and Amazon’s algorithm reads that as a weak listing. Every category should be a place your ideal reader would genuinely browse. Get this right alongside your cover, description, and pricing, and your book becomes far easier to find. Our Amazon book marketing guide covers how categories fit the bigger visibility picture.
Helpful resources
Frequently asked questions
How many categories can a book have on Amazon?
You select a limited number at upload, but Amazon can place a book in up to ten categories. You can request additional relevant placements through KDP support to appear on more bestseller lists.
How do I become a bestseller on Amazon?
Rank near the top of a specific category during a sales spike. Choose relevant but less-competitive sub-categories you can realistically win, rather than broad categories dominated by major titles, and time a promotion to concentrate sales.
How do Amazon keywords affect categories?
Amazon assigns some categories automatically based on your seven backend keywords, and certain niche categories are only reachable through specific keyword phrases. Research those phrases and include them in your keyword fields and description.
Should I pick the biggest category for more sales?
No. Broad categories are extremely competitive and hard to rank in. A relevant, specific sub-category with real readers is far more winnable and can earn you a bestseller badge that boosts conversions.
Want your book positioned to rank?
Author’s Craft researches your categories, keywords, and metadata so your book lands where the right readers browse — and where a bestseller badge is within reach. Get a listing strategy.