How to Write a Book With ChatGPT
A step-by-step method for writing a book with ChatGPT, with prompts for planning, outlining, drafting and editing, plus where a general chatbot falls short.
By Philip GhezelbashYou can write a book with ChatGPT by working in small steps: plan the reader and promise yourself, ask for an outline, draft one chapter at a time while feeding back what's already been covered, then edit hard and fact-check. It works, but a general chatbot leaves a lot of management to you: keeping track of earlier chapters, formatting, the cover and the final files.
This guide gives you the method and the prompts, and is honest about where ChatGPT starts to struggle on a long project. The same approach applies to other chat assistants.
What ChatGPT is good for in a book
| Job | How well it works |
|---|---|
| Brainstorming topics and titles | Very well |
| Suggesting an outline | Well |
| Drafting a chapter from a clear brief | Well, if you give it good material |
| Rewriting, tightening and fixing grammar | Very well |
| Changing tone or reading level | Well |
| Staying consistent across a whole book | Weak without your help |
| Facts, statistics and quotes | Unreliable. Check everything |
| Formatting, covers and EPUB or PDF files | Not built for it |
For a big picture of the full process, see how to write an ebook with AI. This post focuses on doing it in a chat.
Step 1: Plan before you prompt
Write these yourself, in your own words, before opening the chat:
- The reader: one sentence about a specific person.
- The promise: what they can do after reading.
- Your raw material: notes, stories, numbers, opinions and sources.
- Your length target: see how long an ebook should be.
Skipping this is the main reason chatbot books come out generic. ChatGPT works with what you give it, and if you give it little, it fills the gaps with the most average content.
Step 2: Set up the project
Start a new chat for the book and give it standing instructions. Many chat tools also let you save instructions or use a project area, which helps because you can reuse them. Here is a starter you can adapt, written for a short book on running one-on-one meetings. Swap in your own reader, promise and length.
You are helping me write a book. The reader is a first-time manager at a small company who has never run a one-on-one meeting. After reading, they will be able to run a 15-minute weekly one-on-one that their team finds useful. The book is about 15,000 words. Voice: write like I talk to one reader, with short sentences, plain words and "you." No filler openings. Give a specific example for every claim. Never invent statistics, names, studies or quotes. If you need a fact or example you do not have, flag the gap for me instead of guessing. Ask me questions if my brief is unclear.
Paste in 200 to 400 words of your own writing and add, "Match this style."
Step 3: Build the outline
Paste your raw material into a prompt like this:
My raw material is pasted below: notes, stories and numbers. Suggest an outline with 6 to 10 chapters. For each chapter, give a one-line purpose that starts "By the end of this chapter, the reader can" and list the 3 to 5 points it covers. Order the chapters the way the reader needs them. Flag any chapter that does not move the reader toward the promise.
Then edit the outline like an editor. Cut anything repeated, add anything missing, and reorder until it follows how your reader would actually learn the topic. It takes minutes to fix an outline and days to fix a finished draft.
Save the final outline in a document outside the chat. You will paste it back often.
Step 4: Draft one chapter at a time
Don't ask for the whole book at once. You will get thin, repetitive chapters. For each chapter, give the tool what it needs, for example:
The final outline and a short summary of the chapters already written are pasted below, so you don't repeat them. Write chapter 4, "Your first one-on-one," in about 2,000 words. Open with the main point, then explain it. Use the notes and stories below for examples. Where you don't have a real example, flag the gap for me instead of making one up.
After each chapter, ask for a four-line summary and add it to your running "what's been covered" list. This is the single most useful habit for keeping a long book consistent.
Step 5: Fix the limits of a long chat
This is where a general chatbot gets harder to use for a book.
| Problem | Why it happens | What to do |
|---|---|---|
| Repeats earlier points | It can lose track of what was said earlier in a long chat | Paste the outline and the running summary into each new chapter prompt |
| Tone drifts | Style instructions fade over a long conversation | Re-paste the voice guide, and your sample, every few chapters |
| Invented facts | It predicts plausible text, not verified text | Ban inventions in your prompt, and check every claim yourself |
| Generic examples | It defaults to the average case | Supply your own stories and numbers |
| Formatting is manual | Chat output is plain text | Move text into a design or book tool |
| Slower in long threads | Very long chats can get unwieldy | Start a new chat per chapter, with the outline and summary pasted in |
If a chat starts to feel confused, open a new one and re-supply the context. It's often faster than correcting it.
Step 6: Make it yours
A chatbot draft is competent and flat. Your job is to add what it doesn't have.
- A real story in each chapter, with details.
- Your numbers, from your own work.
- Your opinions, especially where you disagree with common advice.
- Cuts, because every paragraph that repeats a point weakens the book.
Watch for common AI habits: stock openers like "In today's fast-paced world," lists that always have three items, vague authorities ("experts say"), and chapters that end by restating themselves. Rewrite them in plain words. Reading aloud is a good test.
You can also use ChatGPT as an editor on your own writing:
Here is my draft. Do not rewrite it. List the five weakest sentences, explain why each is weak, and suggest a tighter version of each. Keep my voice.
Step 7: Check every fact
This step is not optional. ChatGPT can state invented statistics, fake studies and wrong rules with total confidence.
Check against reliable sources:
- Numbers, percentages and dollar amounts
- Names, titles, companies and dates
- Quotes, including whether the person said them
- Laws, fees, store rules and policies
- Any health, legal, tax or money claim
For high-stakes topics, have a qualified person review the text. Remove any claim you can't source. Go through every gap the tool flagged and fill or cut each one.
Step 8: Edit in passes
Read for structure first, then clarity, then proofread. Our guide on how to write an ebook explains the three passes. Ask two people from your target audience to read it and tell you where they got lost.
Step 9: Turn the text into a book
Here is the part ChatGPT isn't built for. It can make images and simple files, but not a store-ready cover, a validated EPUB or a print interior. A finished manuscript still needs:
- Layout and design: fonts, headings, a table of contents and front and back matter
- A cover in the right size for each store (see how to design an ebook cover)
- Files: an EPUB for stores and a PDF for direct sales (see PDF vs EPUB)
- Publishing: upload, metadata and pricing (see how to publish an ebook on Amazon KDP)
Many people paste their text into a word processor or a design tool, build a cover elsewhere, and export. That works, but it's several more tools and a lot of fiddling.
Disclose AI use where required
If ChatGPT wrote your text, Amazon KDP treats it as AI-generated and requires you to tell it, even if you edited heavily. Apple Books and Etsy also have rules. We explain each in Can I publish a book written by AI on Amazon?.
ChatGPT or a dedicated book tool?
Both are valid. The choice depends on how much you want to manage.
| ChatGPT or another chatbot | Dedicated ebook generator like Koobe | |
|---|---|---|
| Setup | You write your own prompts | Describe the book, and the tool plans it |
| Outline | You ask for it and manage it | Built in, and you edit it before writing |
| Chapter context | You paste summaries yourself | Each chapter is written knowing earlier ones |
| Editing | Re-prompt in the chat | Assistant and editor inside the book |
| Design and cover | Separate tools | Included |
| Files | You build them elsewhere | EPUB, PDF and print PDF exports |
| Flexibility | Very high | Built around books |
| Cost | Free, or your chatbot subscription | Koobe plans; create and preview your first book free |
If you enjoy controlling each step and already know your way around, a chatbot is a good choice. If you'd rather get from an idea to store-ready files without stitching tools together, a generator saves time. For other options, compare the best AI book writers, or see how much an ebook ghostwriter costs if you'd rather hire a writer.
Where Koobe fits
Koobe does the parts of this workflow that are tedious in a chat. You describe the book or upload your notes, you edit the outline before anything is written, and each chapter is written knowing what earlier chapters covered, so you don't paste summaries. A built-in assistant can shorten or expand chapters, and Koobe designs four covers and exports an EPUB, a digital PDF and a print interior PDF. You still do the part that matters most: reading every page, adding your experience and checking every fact.
Describe your book in a sentence. Koobe plans the chapters, writes them, designs the cover and exports a PDF and EPUB. Your first book is free.
“Files were ready for KDP, which is what I actually needed. First book I’ve finished.”
The short answer, again
- Plan the reader, the promise and your raw material before you prompt.
- Get an outline, edit it, and save it outside the chat.
- Draft one chapter at a time, and paste in the outline and a running summary each time.
- Tell it to mark gaps instead of inventing facts.
- Add your own stories and numbers, check every fact and edit in passes.
- Plan for the extra work: design, cover, files and publishing.
- Disclose AI use where stores require it.