Book Factory drafts your outline and chapters in your voice — then runs the checks a good editor would: facts and citations for non-fiction, continuity and craft for fiction. You review, edit, and export publish-ready files for Kindle, paperback, and the web.
Real screen recording — a draft you then edit and control.
AI does the heavy lifting; you make the calls. Every book is drafted in your voice and checked for the things readers (and editors) notice.
Three steps, shown as real recordings of the product.
Enter your topic, audience, and direction. AI generates a complete chapter-by-chapter outline in about a minute.
Each chapter drafts in one click — watch it write. Refine in the built-in editor, or regenerate with feedback.
Build a Kindle-ready EPUB, PDF, or interactive HTML and download it. Upload straight to Amazon KDP.
Each time a chapter is written or saved, it's scored by Jev, a fast judge model from TypeSafe, against a fixed bank of questions for its book type — plus a continuity pass that reads it beside the chapters before it and checks it against the facts they established. Findings flow straight into the editor pass as concrete fixes.
No problems flagged.
Style issues flagged, each with a specific fix for the editor pass.
A high-confidence blocking problem — the book won't pass the publish-ready check until it's fixed or you override it as a labelled draft.
Chapter verdicts roll up into checks no single chapter can answer.
A single book grade in the Quality tab — withheld, with the reason, until enough of the book has been measured to mean something.
For fiction and non-fiction. High-confidence problems block the final build; you can answer a finding back with your reason, and a build that goes ahead on one says so.
Facts, names, and events checked against everything earlier chapters established — plus numbering, cross-references, and a real ending.
Totals, balances, and percentages are recomputed, so a figure that doesn't add up gets caught instead of printed.
For non-fiction: does the book build toward something, are the chapters in a defensible order, is anything missing or said twice. Advice, not a gate.
Every chapter also gets a slop score: how densely it uses the words and phrasing machine prose overuses, built on the open-source slop-score lists behind the EQ-Bench creative-writing leaderboard.
Start free today. Paid plans are coming soon — join the waitlist to hear first.
Your books are private to your account. We don't train on your work, any keys you add are encrypted, and you can export everything at any time.
Book Factory helps you write books — fiction and non-fiction. You describe your book and the voice you want, and it drafts a chapter-by-chapter outline and each chapter in that voice. You edit anything, run an editor's quality checks, and export a finished book as a Kindle-ready EPUB, PDF, paperback, or interactive HTML.
That's the problem we built the quality engine to solve. You set the voice and direction up front, and you edit or rewrite anything you want — nothing publishes on its own. On top of that, every chapter is scored by the Jev judge and a slop score for machine-writing tells (stock phrases, filler, restated ideas) — plus sourcing checks for non-fiction and continuity and scene craft for fiction. The goal is a book that reads like you wrote it, because you did.
The Free plan is $0. It includes $4 of AI writing — about 40 chapters, or roughly three typical books — with every feature and export format, and no API key needed. When the allowance runs out you can add your own Anthropic key and keep writing. A Pro plan with a monthly AI allowance is coming soon — join the waitlist to be notified.
No. The Free plan writes books for you with no API key required. Bringing your own AI key is an optional upgrade for people who want to run higher-quality models on their own account.
EPUB (Kindle and e-readers), PDF, KDP-ready paperback PDF, and interactive HTML. You can download your book and upload it directly to Amazon KDP or any other platform.
Yes. Book Factory exports KDP-ready files and can generate a KDP listing (title, description, keywords). You own the books you create and are free to publish and sell them.
You do. Books you create are private to your account, Book Factory does not train on your content, and you can export everything at any time.