An ebook is more than text: it needs a table of contents, clean chapter structure, and formatting that survives Kindle and other e-readers. Book Factory writes the book with you and builds the file, so you don't have to fight a converter at the end.
Free plan: $4 of AI writing included — about 40 chapters — and no API key needed.
Real screen recordings of the product.
Describe the topic or premise, the reader, and the chapter count. The AI drafts a chapter-by-chapter outline you can edit.
Generate each chapter in your voice and edit it in the built-in editor. Regenerate any chapter with notes.
Choose EPUB and build. The file is generated by a real publishing pipeline with a table of contents and e-reader-safe styling, ready to download and upload.
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.
Build as many formats as you need from the same manuscript. Edit a chapter, rebuild, and every format stays in sync.
When the ebook is ready, Book Factory can draft your store listing — title, subtitle, description, and keywords — from the book's own chapters, so the listing matches what's actually in it.
Yes. KDP accepts EPUB uploads for Kindle ebooks, and Book Factory's EPUB is built with Kindle-compatible styling. It also exports KDP paperback interior and cover PDFs if you want print.
Yes. You own what you create and can sell it on any platform, subject to that platform's rules — including disclosure requirements for AI-generated content.
Book Factory can draft cover artwork and builds a KDP wraparound cover PDF for paperbacks. Many authors still commission or design their own cover; you can use either.
Yes. The Free plan includes $4 of AI writing — about 40 chapters, or roughly three typical books — with every feature and export format and no API key needed. If you use it up, you can add your own Anthropic key in Settings and keep writing. A Pro plan is coming soon.