You can write a book with AI, but not by asking for one. AI is useful for three parts of the job: working out the outline, drafting one scene at a time from your notes, and editing what you have written. The premise, the voice and the facts have to come from you. So do the notes that hold the book together, because a model will contradict chapter three by chapter twelve unless you remind it what chapter three said.
One thing to say early, since we make an AI model ourselves: Hemmingway-1 is better at short writing than at novels. This page says where it helps on a book and where a different tool is the better choice.
What AI can and cannot do for a book
| Job | How well | What to know |
|---|---|---|
| Ideas, names, titles, what-ifs | Well | Ask for twenty and keep two |
| Outlining from your premise | Well | Its first outline is the expected one. Push for others |
| Drafting a scene from detailed notes | Fairly well | The draft needs heavy editing |
| Writing a whole book in one go | Badly | It repeats itself, drifts and goes flat |
| Keeping continuity | Badly, unless you help | You keep the notes and paste them in |
| Line editing | Well | Tell it to keep your voice and change no facts |
| Facts for non-fiction | Not to be trusted | Check every one against a real source |
| Telling you whether it is good | Poorly | It tends to praise |
The method
1. Write the premise yourself
One paragraph, by hand. For a novel: who it is about, what they want, what is in the way, and roughly how it ends. For non-fiction: who the reader is, what they will be able to do after reading, and why you are the one to tell them. If you cannot write this paragraph, no tool can write the book.
2. Build the outline together
Give the AI your premise and ask for three different outlines. Take the best parts of each. Then ask for a chapter list with one line a chapter, and under each chapter the scenes or the points it has to make. Argue with it. When a chapter seems thin, ask what is missing. The outline generator and the plot generator will each give you a first version to push against.
3. Keep a story bible
This is a plain document that you keep, and it matters more than any prompt.
- Characters. Age, how they speak, what they want, and fixed facts such as eye colour or the name of a dead brother.
- Places and the timeline.
- The rules of the world, if it has any.
- The outline.
- A running summary. Three or four lines for each finished chapter.
- Style notes, and a page of your own prose.
Paste the relevant parts in at the start of every session. For non-fiction the same document holds your terms, your sources and the argument of each chapter. The character backstory generator can help fill the first section.
4. Draft scene by scene
One scene per request, never a whole chapter. Tell it what came before, what this scene is for, who is in it, what changes and where it stops.
Here is a page of my writing, for style: [your sample]. Here is the story so far: [your summary]. Write the next scene, about 700 words. Where: [place]. Who: [characters, with what each wants]. What happens: [the beats, in order]. It ends when [the moment]. Do not resolve anything beyond this scene. Only the scene.
5. Rewrite every scene
What comes back is raw material. Change the order, cut the explaining, put in the details only you know, and rewrite the lines that matter most. If you are keeping more than half of its sentences, you are probably going too fast, and a reader will feel it.
6. Edit in passes
Ask narrow questions, one at a time:
- "Check this chapter against the character notes and list anything that does not match."
- "Where does the pace drop? Quote the line."
- "Which words and phrases do I repeat?"
- "Tighten this paragraph. Change no facts and keep my voice."
Do not ask whether the chapter is good. You will be told it is.
7. Give it to people
Read the whole book yourself, aloud where you can. Then give it to human readers, and to an editor if you mean to publish. An AI will not tell you that chapter nine bored it.
Non-fiction
In a non-fiction book, your knowledge is the book. Use AI for the structure, for turning your spoken notes or rough paragraphs into clean ones, for plainer wording, and for a summary at the end of each chapter. Do not use it for the facts. It invents quotes, figures and sources and states them with confidence. For a book that touches on health, law or money, have someone qualified check it.
Where AI-written books go wrong
- Sameness. Every chapter ends on the same thoughtful note, and the same phrases come round again.
- One voice. Every character talks like every other.
- A soft middle. Models avoid conflict and settle arguments too quickly, so nothing builds.
- Summary in place of scene. It tells you that two people argued when it should let you hear them.
- Continuity. The scar moves from the left hand to the right.
Each of these is fixed in the rewrite, by you, with the story bible open.
Which tool for which part
For drafting long chapters, use a large story model. In StoryBench, our own creative writing test, Fable 5 Max and GLM-5.3 scored above Hemmingway-1, which sits level with Kimi K3. The full results.
There are also tools built around the novel as a project. Sudowrite, for one, says on its site that it is built for fiction writers and takes you from idea to outline to chapters. We have not tested it. Hemmingway vs Sudowrite sets out the difference.
Hemmingway is useful for the short writing in and around a book: a single scene, a letter one character writes to another, the blurb, the email to an agent, a title from the book title generator. Its context is 262,144 tokens, so your notes and several chapters fit in one chat, though fitting is not the same as keeping track. It can save what it writes as a PDF or a Markdown file. It writes best in English. How to write a short story with an AI story writer covers prompting and editing at scene length.
Be honest about it
Publishers, agents, competitions and online stores each have their own rules on AI. Read them before you submit, and say what you used where they ask. Who owns text written with AI is a legal question that differs from country to country, and this page cannot answer it. Ask a professional if it matters for your book.
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Common questions
Can AI write an entire book?
It can produce book-length text, but not a good book on its own. Over that length it repeats itself, loses the plot and flattens every voice. Used for the outline, scene drafts and edits, with you doing the planning and rewriting, it helps.
How long does it take to write a book with AI?
The first draft goes faster, because you are never stuck at a blank page. The planning, the rewriting and the reading take as long as they always did, and they are most of the work.
What is the best AI for writing a book?
It depends on the part. For long chapters, large story models scored highest in our own story test. For a project built around a novel there are specialist tools, which we have not tested. For short pieces that must sound like a person, Hemmingway-1 is built for that.
Can I publish a book written with AI?
Check the rules of the publisher, store or competition first, and disclose what they ask you to. Rights in AI-written text are a legal matter that varies by country, so take advice if it matters for your book.
How do I keep an AI consistent across chapters?
Keep a story bible with your characters, timeline and a short summary of each finished chapter, and paste the relevant parts in every time you start. Then ask it to check each new chapter against those notes.
Should I use AI to write non-fiction?
Use it for structure, rewording and summaries of what you already know. Do not use it as a source, because it makes up facts, quotes and references and states them with confidence.