AI ebook writer for nonfiction: from one paragraph to EPUB

Why a long book is not one long prompt

A whole book asked for in one prompt tends to repeat itself and lose its argument. Chapbook works from an outline instead: title options, a one-line positioning, and a chapter-by-chapter plan with a word count for each. You reorder, rewrite or cut chapters until the plan is the book you meant, and only then is anything drafted.

Each chapter is then drafted against its line in that plan. The sample here, The Pricing Playbook, moves from why guessing fails through interviewing customers to setting the numbers, in the order the outline set, and was exported unedited so you can judge the first draft as it came.

Your material, your call

Add up to 10 sources (PDFs, documents, text, or up to 5 web pages), and chapters draw on them and cite them inline. A read-through flags claims no source supports. It can only flag them: checking what is true stays with you.

Your voice comes from up to 5 samples of your own writing. After the first draft, edit any passage by hand or ask for a rewrite; the assistant’s changes arrive as suggestions you accept or reject, and earlier versions of a chapter stay in its history.

Who it is for

• Experts writing the book of their method, the one that gets them hired or booked.
• Nonfiction authors publishing a first ebook who want a draft to edit, not a finished book to trust.
• Founders and practitioners with years of notes and talks that never became one argument.

If you publish it on Amazon

The EPUB 3 works with Kindle, Apple Books and Kobo. Beside it, the KDP listing tab sets out your description, keywords and categories in the order of KDP’s own form, and a nonfiction book also exports a KDP-sized paperback interior and wrap cover from the same manuscript.

Three things to plan for:

• Disclosure. KDP’s Content Guidelines require you to tell it about AI-generated content when you publish. The free AI-generated or AI-assisted helper quotes KDP’s definitions and walks through your case.
• The weekly limit. As of 29 October 2026, KDP allows 2 new titles per format each week; the guide to the limit has the details and its sources. The weekly-limit planner shows what that means for a release schedule.
• Price. The free royalty calculator shows what a sale earns at each royalty rate. It says nothing about how many will sell, and neither do we.

How it works

1. Write the brief. One paragraph: the reader, the promise and how it should sound.
2. Approve the outline. Planning uses 10 credits. Change anything before a word is drafted.
3. Read it free. The free plan drafts one chapter of up to 2,500 words, with a watermarked cover, so you can judge the voice before paying.
4. Draft, edit, export. Drafting uses 1 credit per 125 words, and credits reserved for words that were not written come back.

What it does not do

Chapbook does not write fiction, make a hardcover, or upload anything to a store for you. It writes books in English, Spanish, German, French, Portuguese (Brazil), Italian and Dutch, up to 40,000 words. A book it drafts is still a first draft: plan to read every chapter, fix what you know better, and check every claim before your name goes on it.