Write a book with AI
AI Book Writer for Fiction or Nonfiction
Write a book with AI from a sentence or your notes. River builds an outline that fits your kind of book, then writes chapter one.
Free to start. No card needed.
Friday Night, Handled · Chapter 1 of 12
The 4 p.m. Walk-Through
Most bad Friday nights are decided before the first guest sits down. By eight, you won't have time to notice that the ice machine is struggling or that table twelve wobbles. At four, you do.
[Your story: the night something failed that a walk-through would have caught.]
Start at the front door and walk the route a guest walks. [Source needed: how much first impressions shape a diner's view of the meal.]
Outline: 12 chapters, one takeaway each. Gaps marked for you: 1 story, 1 source.
What you'll get
An outline fitted to your book and a full first chapter
- An outline shaped for your kind of book
- A full first chapter, ready to revise
- Nonfiction gaps marked, never filled with made-up facts
Before and after
Your idea in. A book you can build on out.
A guide for first-time restaurant managers on running a calm Friday night. I ran a 120-seat bistro in Leeds for nine years. Must cover the 4 p.m. walk-through, reading the reservation book, the pre-shift huddle, and what to do when the kitchen falls behind. My story for chapter 1: the Friday our walk-in fridge died at 6 p.m. and we lost half the menu.
Friday Night, Handled: A First-Time Manager's Guide to Service Without Panic. The promise: By the last page, you can run a full Friday service without losing the floor, the kitchen or your temper. Outline (first 3 of 12). 1. The 4 p.m. Walk-Through. Takeaway: spot what will break at eight before it does. 2. Reading the Book. Takeaway: turn the reservation list into a staffing plan. 3. The Pre-Shift Huddle. Takeaway: brief the team in five minutes flat. Chapter 1 opens: Most bad Friday nights are decided before the first guest sits down. Mine was decided at six o'clock, when the walk-in fridge died and took half the menu with it. [Source needed: how often kitchen equipment fails during service.]
Fiction gets a chapter plan with a job per chapter instead. Nonfiction gets takeaways and honest gaps.
Why it works
How do you write a book with AI?
An AI book writer turns your idea into an outline and draft chapters. Describe your novel or nonfiction book in a sentence, or paste your notes. River works out which kind it is, writes an outline shaped for it, and drafts a full first chapter in a doc you keep editing. It works the way a book actually gets written: outline first, then one chapter at a time, with you revising in between. The next chapter is one request away whenever you're ready, and every word stays editable.
The outline changes with the book. A how-to, business or self-help book gets the reader's promise, then 10 to 12 chapters with one takeaway each. A memoir is ordered by what your moments mean, with gaps left as questions. A novel gets a chapter plan where each chapter says what happens and what changes. A business book doesn't need character profiles, and a novel doesn't need takeaways. Writing a novel? The AI novel writer is built for fiction. Want only the chapter list? The book outline generator stops there.
Nonfiction gets one extra safeguard: River never invents an anecdote, client, statistic, study or quote. Where your chapter needs one, it leaves a marked gap: [Your story: …] for something only you lived, [Source needed: …] for a claim you'll check. The doc ends with a list of what only you can add. Verify each claim yourself before anyone else reads it. Writing about your own life rather than teaching? The AI memoir writer starts from your moments instead.
What lands in your doc
What lands in your book doc
- A book brief with a working title, who it's for and the promise it makes
- Nonfiction outlines of 10 to 12 chapters, each with one takeaway for the reader
- Fiction chapter plans where every chapter says what happens and what changes
- A full first chapter that opens on a situation your reader recognizes, not a definition
- Marked gaps for your own stories and for sources, instead of invented facts or quotes
- A closing list of what only you can add before the chapter is finished
- Later chapters in their own docs, written after River rereads the outline and last chapter
How it works
From your idea to a book in progress
Describe your book
Say what it's about and who it's for, and paste any notes, stories or chapter ideas.
River spots the kind
It tells a how-to or business book from a memoir or a novel, so there's nothing to pick.
Review your outline
Read the outline and chapter one in your doc, and fill any marked gaps yourself.
Keep building
Ask for chapter two, a change to the outline, or a fresh take on chapter one.
How to write a book with AI, step by step
Start with who the book is for and what it gives them, or who your story follows and what they want, plus any notes you have. Then let the outline carry the weight. Read it before anything else: move chapters, merge two that overlap, cut one that repeats. In a good outline, each chapter does a job no other chapter does. Only then write, one chapter at a time, so every chapter builds on the plan you approved. If a chapter surprises you, update the outline before moving on.
Revise every chapter as if a stranger drafted it, because in a sense one did. The Authors Guild tells authors to keep AI from replacing their own voice and thinking, and to disclose substantial AI-generated text to readers. In nonfiction, fill each marked gap with your real story or a source you've checked, then read every claim twice. That's the work that turns a draft into a book you can put your name on.
How much of the book you write yourself is your call, and it matters for what you own. The US Copyright Office protects the expressive choices a human author makes, not prompts alone, so the more you rewrite and arrange, the stronger your claim. Pitching publishers with a nonfiction book? The book proposal template turns your outline into the chapter summaries a proposal needs. When your manuscript is done, Publish a Book on Amazon prepares your description, keywords, categories and author bio in one pack.
Questions authors ask
Common questions
What is an AI book writer?
An AI book writer is a tool that helps you plan and draft a whole book. This one reads your idea or notes and decides whether it's a how-to, a memoir or a novel. It writes an outline shaped for that kind of book, then a full first chapter. Comparing tools? See our guide to the best AI for writing a book.
Can AI write a book?
Yes, in drafts. River writes an outline first, then a full first chapter, then each next chapter when you ask. What it can't supply is your judgment, your stories and, in nonfiction, your facts. You shape the outline, fill the marked gaps and revise until the book reads like you. That part is what makes it good.
Will it make up facts in my nonfiction book?
It's told not to. Instead of inventing a statistic, study, quote or client story, River leaves a marked gap such as [Source needed: …] or [Your story: …]. The doc then ends with a list of what only you can add. Check every claim yourself before the book goes anywhere, especially on health, money or law.
Can Amazon tell if a book was written by AI?
Amazon doesn't say whether or how it checks. What its content guidelines do say is that you must disclose AI-generated text when you publish, while writing you did yourself and only polished with AI needs no disclosure. Answer that question honestly, then revise until the book sounds like you, not like a template.
Can I write a book with AI for free?
You can start free on River's Free plan, with no card, and your outline and first chapter land in your own workspace. Free usage pauses at its limit; paid plans on the pricing page begin at $14 a month (as of October 2026) for when you're ready for more chapters.
How long will my book be?
For fiction, River sizes the plan to your genre: about 85,000 words in 24 chapters for adult fiction, the middle of the range Writer's Digest recommends. Nonfiction length depends on your subject, so River plans by takeaways rather than word count, 10 to 12 chapters that each teach one thing. Ask to expand or trim the outline anytime.
Your next step
More for your book
Your book starts with what you know
Bring a sentence or a stack of notes. Get your outline and chapter one, then keep going whenever you're ready.