How to Find Low Content Book Ideas for KDP: A Method, Not a Trend List
A four-step method for finding low content book ideas: pick a category, size it with a BSR calculator, and check the title for tra…
Type “amazon kdp best sellers” or “amazon kdp non fiction best sellers” into Google and you’re hoping for a list: the specific books or niches currently winning on Kindle Direct Publishing (KDP). That list doesn’t exist — not as a published page, not as a filter, not as anything KDP maintains. Here’s what actually exists instead, and how to do the research by hand.
There is no separate “KDP best sellers” list
Amazon publishes no bestseller list by exact sales, and no per-title sales-volume feed. KDP is Amazon’s self-publishing platform, not a distinct storefront with its own chart — so when someone searches “KDP best sellers,” they’re asking a question Amazon has no dedicated page to answer.
What the category pages do show is Best Sellers Rank (BSR) — and BSR, not a sales-volume list, is the only public signal that exists for any book on Amazon, KDP or not.
What BSR actually tells you
BSR ranks a book against everything else in its store. It is a relative rank, not a unit count — Amazon does not publish how many copies rank #500 or #50,000 sold, and it never has.
To turn a specific rank into an order-of-magnitude sales estimate, use the free BSR-to-sales calculator — built on the same honesty constraint as this article: Amazon publishes no BSR-to-sales formula, so any tool, this one included, is an interpolation across reported data points, not a lookup table. Treat the output as a range, not an exact figure.
The manual research method (since there’s no list to copy)
Because there’s no official ranking of “best KDP niches” to read off a page, the actual research is manual — the same method whether you’re checking fiction, nonfiction, or a niche within either:
- Search Amazon within the category you’re evaluating (a specific Nonfiction subcategory, for example).
- Open the top results in that category, one at a time.
- For each, record its BSR, price, review count and, where visible on the listing, page count and trim size — price sets the royalty band you’d compete in; page count and trim feed your own printing cost.
- Repeat the search on a different day — a single snapshot tells you far less than two, since a rank is only a point-in-time reading.
What you’re building is a spread across the field, not a single “winner.” A category where several different books at different price points all hold a strong rank is a stronger signal than any one title ranked #1 today and gone from the page next month.
Turning a candidate price into real royalty math
Once you have a price range from your research, run it through the actual KDP paperback royalty rule: royalty = (rate × list price) − printing cost. The rate is 50% at or below $9.98, 60% from $9.99 up, in the US Amazon channel — there’s no separate “royalty plan” to pick for a paperback the way many searches imply; the rate is simply set by which side of $9.99 your list price falls on.
Printing cost depends on trim and page count. Large trim (bigger than 6.12″×9″, e.g. an 8.5×11 workbook) runs a flat $2.84 for 24–110 pages, then $1.00 + $0.017/page beyond that. Regular trim (up to 6.12″×9″) is $2.30 flat for 24–110 pages, then $1.00 + $0.012/page.
Worked example: a 150-page, 8.5×11 title at $12.99. Printing cost is $1.00 + (150 × $0.017) = $3.55; royalty share is $12.99 × 60% = $7.794; net is $7.794 − $3.55 = $4.24/copy. Trim to 110 pages and the flat large-trim rate of $2.84 applies instead: $7.794 − $2.84 = $4.95/copy — seventy-one cents more from crossing a page-count line, not the content. Run your own numbers on the KDP royalty calculator and printing-cost calculator.
Expanded Distribution isn’t a second “plan” either
The other thing people search for alongside a royalty plan is Expanded Distribution — free to enroll, paperback only (hardcover isn’t eligible), paying a flat 40% of list price minus printing cost through Amazon’s US and UK distributors to bookstores, libraries and academic institutions. Enrolling doesn’t guarantee any bookstore or library actually orders your book; it’s a channel, not a sales guarantee. (Kindle eBooks have a genuinely separate 35%/70% royalty choice, but it’s an eBook-only setting, not something that applies to the paperback math above.)
Tools that speed up the manual method
Reading listings by hand, one at a time, repeatedly, is real work. Book Bolt (bookbolt.io) bundles BSR-derived sales estimates, cloud keyword data, and a Chrome extension, KDP Spy, that overlays price, rank, reviews and an estimated sales figure onto Amazon search results, so you’re not opening each listing individually. It runs $23.99/mo ($19.99 annually) on Pro, $35.99/mo ($29.99 annually) on Premium, 3-day card trial; Premium only adds AI credit volume, extra graphics packs, beta access and priority support — KDP Spy ships inside both tiers.
Once you’ve settled on a category and format, Octozia’s KDP Creator generates the interior pages — sudoku, word search, maze, math, number-fill, crossword and word-scramble, seven generators — as a ZIP of numbered 300-DPI PNGs plus a manifest file (you assemble the interior yourself; it doesn’t output a finished PDF). $9.99/mo, $99.99/yr, or $79.99 lifetime — see full pricing, or our Book Bolt comparison.
FAQ
Is there an official Amazon KDP bestseller list?
No. Amazon publishes no bestseller list by exact sales and no per-title sales-volume feed — KDP is a self-publishing platform, not a separate storefront with its own chart. The only public per-book signal is Best Sellers Rank: a relative rank, not a sales count.
What counts as a “good” BSR for a KDP book?
There’s no published threshold: Amazon doesn’t say what a given rank means in units. Use the BSR-to-sales calculator for an order-of-magnitude range, not one number to hit.
Do I need to choose a royalty plan for a KDP paperback?
No. The rate is set by your list price — 50% at or below $9.98, 60% at $9.99 and up — minus printing cost. The only real choice is whether to enroll in Expanded Distribution (free, paperback only, flat 40% of list price minus printing cost). Kindle eBooks have a separate, genuine 35%/70% royalty choice, but it’s an eBook-only setting.
How is BSR different from an actual sales number?
BSR ranks a book against every other book in its store. It’s a relative rank, not a unit count, and Amazon has never published a formula converting rank to sales. Any BSR-to-sales tool, ours included, is an estimate from reported reference points, not an official figure.
What’s the fastest way to check BSR across many listings at once?
Manually, it’s one listing at a time. Book Bolt’s KDP Spy extension overlays price, rank, reviews and an estimated sales figure onto Amazon’s search results, so you don’t have to open each listing individually.
