AI book generator for Amazon KDP
One sentence in, print-ready book files out
Describe the book you want and KDPBookKit plans it, writes or illustrates it, and packs the files Amazon KDP actually accepts: an interior PDF with bleed, a cover wrap sized to the page count, an EPUB 3 and an editable Word file.
The builder opens later — credits are not on sale yet
Planning is free: you get a chapter or page plan, title options and an exact credit quote before a single word is generated. Credits are spent only when you approve the plan. You publish under your own Amazon KDP account, so you keep 100% of your royalties.
Rates checked 2026-11-10 · 8 marketplaces · 8 trims
What you get
Five files, and the checklist that tells you what to choose
A generated chapter is not a book. These are the pieces KDP needs, with the settings already applied.
Interior PDF
Trim-sized pages, margins by page count, 0.125″ bleed only where the design reaches the edge, 300 DPI.
Cover wrap PDF
Back + spine + front at 12.9256″ × 9.25″ for a 300-page 6×9 book.
EPUB 3
Reflowable ebook with a linked table of contents — the edition KDP sells separately at 70%.
Editable Word file
The same manuscript as a .docx, so you can rewrite a chapter and rebuild without starting over.
Upload checklist
Every KDP field to fill, in order, including the AI-content disclosure question.
Print maths, done for you
At 300 pages the copy costs $4.60 to print and the spine is 0.6756″.
The order matters: the trim is fixed first, because trim decides the spine and the cover wrap; the page count follows from the plan; the margin and bleed settings follow from the page count. That is also why the builder refuses to start without a trim — a book designed at the wrong width cannot be rescued by a wider bleed.
How it works
Three steps, one approval
- 01
Describe the book
Genre, audience, length, trim size. One or two sentences; the plan does the rest.
- 02
Review the plan and the quote
Chapters or pages, title options, cover direction, exact credits. Free until you approve.
- 03
Download the files
Interior PDF, cover wrap, EPUB 3, Word, checklist — plus the page count and spine on the same page.
How this differs
A writer gives you a manuscript. This gives you a book KDP accepts.
| What matters | Generic AI writer | KDPBookKit |
|---|---|---|
| Delivery | A docx you still have to lay out | Interior PDF, cover wrap, EPUB 3 and Word |
| Page count | Unknown until you open Word | Computed from words, trim and leading before you approve |
| Cover size | Your problem | Wrap sized from the page count and paper type |
| KDP settings | Blog posts about them | A checklist that names each field and value |
| Cost | Subscription regardless of use | Credits per build; planning and quotes are free |
| Royalties | Sometimes a revenue share | None — you keep 100% |
KDPBookKit is our own product — this comparison describes what it is built to do, and the builder is not open yet.
Honest boundaries
What it is good at, and where you should not use it
Good fit
- A first book where the maths matters more than the prose: 24–32 page picture books, colouring books, short guides and novellas.
- A series where the same trim, palette and page count have to hold across several titles.
- An author who wants the files, not a writing assistant: you would rather approve a plan than babysit a chat window.
Not a good fit
- Literary fiction that depends on a voice only you can write. Use the calculators, write the book yourself.
- Hardcover or spiral-bound books: the template and cost rules are a different system, and this builder does not cover them yet.
- Anything you intend to publish without reading it. Amazon treats the author as responsible for the content, including AI disclosure.
Being explicit about the limits saves both of us a refund conversation later.
Pick the book type
Each kind of book has its own rules — start from the right page
- Open
Coloring books
Bold line art, single-sided, 8.5×11.
- Open
Children's picture books
One locked cast, 24-page layouts.
- Open
Print-on-demand colouring
Cost per copy and the two upload files.
- Open
Christmas colouring books
Seasonal themes with an upload deadline.
- Open
Word count to pages
How long your manuscript really is.
- Open
Royalty per copy
What the finished book earns.
Credits
Priced per build, not per month
A lead magnet is 45 credits, an 18-chapter novel is 130. Pack credits never expire; unused credits are refundable within 14 days.
Starter pack
$12.00
120 credits
First book most people make
Buy 120 creditsStudio pack
$29.00
320 credits
Two to three books
Buy 320 creditsPress pack
$59.00
800 credits
A series, or a big colouring book
Buy 800 credits
Questions
AI book generator questions
Five: a print-ready interior PDF (with 0.125″ bleed where the design runs to the edge), a cover wrap PDF sized from the page count and paper type, an EPUB 3 for the ebook edition, an editable Word file, and a KDP upload checklist naming every setting to choose.
No. The calculators are live and free; the book builder is still being built and credits are not on sale yet. When it opens, credits will never expire and unused credits will be refundable within 14 days.
Eight paperbacks: 5 × 8, 5.25 × 8, 5.5 × 8.5, 6 × 9, 7 × 10, 8 × 10, 8.5 × 8.5, 8.5 × 11 inches. Trim decides the spine width and the cover wrap, so the builder fixes the trim before it lays out a single page.
By the build, not by your plan: a 6-chapter lead magnet is 45 credits, an 18-chapter novel is 130, a 31-chapter novel is 205. You see the exact quote before anything is written, and credits are spent only when you approve it.
If AI generated the text, images or translation, yes — Amazon KDP asks you to disclose it at publish time. AI-assisted work does not need disclosure. The upload checklist reminds you before you submit.
No. You publish under your own KDP account and keep 100% of your sales. We charge for making files.
A 300-page 6×9 black-and-white paperback is $4.60 in the US, and at $12.99 it earns $3.19 per copy. Every calculator on this site uses the same table, checked 2026-11-10.
Yes. The Word file is editable and the interior is rebuilt from the edited text, so a chapter you rewrite still produces a correct page count, spine and cover wrap.
Start with the numbers, not the pitch
Run your page count, spine width and royalty through the free calculators before you spend a credit.