How do you turn a paragraph into a book plan?
- Start with a premise or subject. Use the bakery mystery example, describe your own fiction idea, or explain the subject and audience for a nonfiction book.
- Generate the plan and opening chapter. You get a title and subtitle, an intended audience, and 8–14 chapters, each with 3–6 concrete beats and a word target.
- Read the draft, then export. Chapter 1 contains 600–900 words of drafted prose. You can export your plan to Markdown or Word (.docx).
What can you try with the example idea?
The bakery mystery gives you a specific starting point: a missing sourdough starter, a seaside bakery, and a town festival approaching. Generate it to inspect a chapter-by-chapter outline and read the opening prose, rather than judging the output by word counts alone.
In a run on October 4, 2026, that premise produced "A Starter for Trouble", an 8-chapter plan targeting 40,000 words, with a 784-word first chapter.
Here is how that run compared with two other examples generated that day. These are planned book lengths, not completed manuscripts.
| Book idea | Chapters | Planned book length | Chapter 1 draft |
|---|---|---|---|
| Seaside bakery mystery, "A Starter for Trouble" | 8 | 40,000 words | 784 words |
| Practical guide for first-time managers in small startups | 10 | 30,000 words | 804 words |
| Children's chapter book for ages 8–10 | 10 | 12,000 words | 790 words |
What gets checked before you see your plan?
An AI model accessed through OpenRouter writes the plan and first chapter. Our own code checks:
- Whether the plan has 8–14 chapters.
- Whether each chapter has 3–6 beats.
- Whether chapter word targets add up to within 5% of the total target.
- Whether the first-chapter draft is 600–900 words.
A plan that fails these checks is regenerated once.
How long it takes
Writing the plan and the first chapter together usually takes about two minutes. The progress bar shows the elapsed time; keep the tab open until the result appears.
How much does WriteMyBookAI cost?
If you need more than one free plan a day, choose a monthly subscription or a one-time pack.
| Option | Price | Book plans |
|---|---|---|
| Free | $0 | 1 per day per visitor, without signup |
| Monthly subscription | $9.90 per month | 60 |
| One-time pack | $4.90 | 15 |
What should you know before generating a plan?
A 40,000-word target does not mean 40,000 drafted words. You get chapter targets for the planned book. The drafted prose is chapter 1, at 600–900 words.
Structure checks check counts and lengths. Read the chapter beats and opening prose to decide whether they give you a starting point you want to use.
Your ideas and plans are not stored in a database. Your idea text is sent to an AI model through OpenRouter to create the plan.