How to Write a Book with AI: The Complete Step-by-Step Guide (2026)

Last updated: March 2026 · 10 min read

Two years ago, writing a book took months. Maybe years if you're the type who "works on it when inspiration strikes" (we all know someone). Today? You can write a full book with AI in under an hour.

Quick Answer: To write a book with AI, choose a tool like ShakespeareAI, enter your title, genre, and storyline, then let the AI generate a complete manuscript. The process takes under 10 minutes for a full book, which you can export to PDF, DOCX, or EPUB for publishing on Amazon KDP.

I'm not talking about a janky, obviously-robotic mess. I'm talking about a structured, readable, publishable book with chapters, character arcs, and prose that doesn't make you cringe. The tools have gotten that good.

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Here's exactly how to do it — step by step, with real examples, free tools, and none of the vague "leverage AI to enhance your creative workflow" nonsense.

Step 1: Pick Your AI Book Writing Tool

Not all AI writing tools are built for books. ChatGPT is great for a lot of things, but asking it to write a 20-chapter novel is like asking a sprinter to run a marathon — technically possible, hilariously painful.

You want a tool that's specifically designed for long-form book writing. Here's the quick breakdown:

My recommendation? If you want the fastest path from "idea" to "published book," go with a full-pipeline tool like ShakespeareAI. If you enjoy the writing process and want AI as a co-pilot, Squibler or Sudowrite are solid picks.

Step 2: Craft Your Book Prompt (This Is Where Most People Mess Up)

Your prompt is everything. A bad prompt gives you a bad book. A good prompt gives you a surprisingly good one.

Bad prompt: "Write me a book about space"

Good prompt: "A sci-fi thriller about a cargo pilot who discovers her ship's AI has been rerouting through an uncharted sector for months. When she investigates, she finds evidence of a civilization that disappeared overnight. First person POV, tense and atmospheric, 15 chapters, similar in tone to The Expanse meets Alien."

See the difference? The good prompt includes:

You don't need to write a full synopsis. Just give the AI enough to understand what kind of book you want. Think of it like briefing a ghostwriter — the more context, the better the result.

Prompt Templates That Work

Here are some templates you can steal:

For fiction:
"Write a [genre] novel about [character] who [situation/conflict]. Set in [setting], [time period]. Tone: [adjectives]. [X] chapters. Similar to [comparable book/author]."

For non-fiction:
"Write a [topic] guide for [audience]. Cover [key subtopics]. Practical, actionable advice with real examples. [X] chapters. Tone: [conversational/professional/etc]."

For children's books:
"A children's book about [character/concept] for ages [range]. [Message/moral]. Rhyming/prose. [X] pages. Illustrations style: [watercolor/cartoon/etc]."

Step 3: Generate and Review the Outline

Before writing chapters, most AI book tools create an outline. This is your blueprint — chapter titles, brief descriptions of what happens in each one, and how the story/content flows.

Why you should actually read the outline:

I know, I know. You want to skip to the good part. But fixing an outline takes 2 minutes. Fixing a badly-structured 200-page book takes... well, let's just say it's a different time commitment.

Things to check:

Tweak the outline before letting the AI write. Trust me on this one.

Step 4: Let AI Write the Chapters

This is the fun part. You hit "generate" and watch as the AI writes your book chapter by chapter.

With ShakespeareAI, you literally click one button and come back to a finished book. With other tools, you might need to prompt each chapter individually.

How long does it take?

During generation, the AI maintains context from previous chapters — character names, plot threads, established facts. Good tools handle this automatically. With ChatGPT, you'll need to remind it of previous chapters in your prompts (and pray it doesn't forget your protagonist's name by chapter 8).

Step 5: Edit and Humanize (Don't Skip This)

Here's where 90% of AI books go wrong. People generate the text, skim it once, and publish. Then they wonder why reviews say "this reads like it was written by a robot."

Because it was. And you didn't fix it.

The editing process:

  1. First read: Read through for major issues — plot holes, contradictions, characters who randomly change personality. Fix these first.
  2. Run the humanizer: Tools like ShakespeareAI's AI Humanizer specifically rewrite AI text to sound more natural. This catches the patterns that scream "AI wrote this" — repetitive structures, overuse of certain phrases, lack of variety.
  3. Add your voice: Inject your personality. Add a joke only you would make. Reference something specific. This is what separates "AI book" from "YOUR book that AI helped with."
  4. Cut the filler: AI loves padding. "It's worth noting that..." — no it isn't, just say it. "In a world where..." — stop. Trim aggressively.
  5. Read it out loud: If something sounds weird when spoken, it'll sound weird when read. This catches more issues than you'd expect.

Editing takes 1-3 hours depending on book length. Yes, that's longer than the generation. That's normal. The AI writes the first draft; you make it good.

Step 6: Generate a Book Cover

Covers sell books. This isn't optional.

If your tool has built-in cover generation (ShakespeareAI does), use it. If not, here are your options:

Cover tips:

Step 7: Create an Audiobook (Optional but Smart)

Audiobooks are the fastest-growing segment of publishing. If you can turn your book into audio, do it.

AI has made this ridiculously easy. AI audiobook generators can narrate your entire book with natural-sounding voices. No recording studio, no voice actor fees, no months of production.

ShakespeareAI has this built in — you click a button, pick a voice, and get a full audiobook. For other tools, services like ElevenLabs or Google Cloud TTS can convert your text to high-quality speech.

Step 8: Publish Your Book

You wrote it. You edited it. You've got a cover. Time to put it in the world.

Amazon KDP (Kindle Direct Publishing):

Google Play Books:

Other options: Apple Books, Barnes & Noble Press, Kobo Writing Life, Smashwords, Draft2Digital (distributes to multiple platforms).

Pro tip: Don't go exclusive to one platform unless you're specifically doing KDP Select (which has its own benefits like Kindle Unlimited). Multi-platform = more readers = more revenue.

How Much Money Can You Make?

Okay, the real talk section.

Can you make money with AI-written books? Yes. Will you get rich from your first book? Probably not.

Here's what realistic looks like:

The strategy isn't "write one viral book." It's "publish consistently in a niche, build a catalog, and let compound growth do its thing." AI makes this possible because you can publish way more frequently than a human-only writer.

People who are killing it with AI books share some traits: they pick a niche, publish regularly (2-4 books/month), optimize their metadata (titles, descriptions, keywords), and actually market their books.

Common Mistakes (and How to Avoid Them)

Publishing without editing. The #1 mistake. Your readers will notice. Run the humanizer, do an editing pass, fix the obvious stuff.

Generic prompts. "Write a romance novel" gives you the most basic, formulaic romance imaginable. Specific prompts = specific (better) results.

Ignoring your cover. People DO judge books by covers. A bad cover kills your sales before anyone reads a word.

Not using keywords. When publishing on KDP or Google Play, your title, subtitle, and description need to include keywords people actually search for. This is how readers find your book.

Expecting instant results. Your first book probably won't chart. That's fine. Keep publishing. The algorithm rewards consistency.

FAQ

Is it legal to publish AI-written books?

Yes. Amazon KDP, Google Play Books, and other platforms all accept AI-assisted content. Amazon asks that you disclose AI involvement during upload, but there's no ban on publishing AI-written books.

How long should my AI book be?

For fiction: 30,000-70,000 words for a standard novel. 15,000-30,000 for a novella. For non-fiction: 20,000-50,000 words depending on the topic. Don't pad — readers hate filler.

Can AI maintain plot consistency across a long book?

Modern AI book tools are specifically built for this. ShakespeareAI and similar platforms maintain character details, plot threads, and established facts across all chapters. Generic AI (like ChatGPT) struggles with this beyond 5-10 chapters.

What genres work best with AI?

Romance, sci-fi, fantasy, thriller, and self-help are the sweet spots. These genres have clear conventions that AI understands well. Literary fiction and poetry are harder — they require more human nuance.

How much does it cost to write a book with AI?

Free to $40/month depending on your tool. ShakespeareAI has a free plan that includes full book generation. Publishing on KDP is free. So technically, you can go from idea to published book for $0.

The Bottom Line

Writing a book with AI in 2026 is genuinely straightforward. The tools handle the heavy lifting. Your job is to have a good idea, write a solid prompt, and put in the editing work to make it yours.

The barrier to becoming a published author has never been lower. Whether you're doing it for fun, for a side income, or because you've always dreamed of seeing your name on a book — there's really no reason not to start.

Ready? Write your first book with ShakespeareAI — free, one prompt, done in minutes.

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