For fantasy writers

Fantasy that remembers its own rules

Keep your world, magic and cast in a story bible, plan the plot on a structure, and write chapters that build on what earlier chapters said. On Pro, book two can remember book one.

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Where long fantasy goes wrong

Readers forgive a slow chapter sooner than a world that cheats.

  • Magic that bends to the plot

    A spell that couldn't save the city in chapter six shouldn't fix everything in chapter twenty.

  • Facts that drift

    Distances, seasons, ranks and names drift across hundreds of pages.

  • Prose that sounds like every other epic

    Every sentence sounds like a prophecy, and none of it sounds like you.

  • Series threads that snap

    A promise made in book one has to pay off in book three.

Building the book in order

Build the setting and the cast first, then write against them.

  1. Build the world

    Use the free world builder for rules, places, factions and conflicts, and save the result to your book's notes.

  2. Set the story

    Choose subgenres such as epic, urban, dark, cozy, grimdark, portal or romantasy, and story elements like a magic system, political intrigue or a quest.

  3. Create the cast

    Generate characters with motivation, conflicts, stakes, an arc and a way of speaking, then edit them until they're yours.

  4. Outline on a structure

    Use the Hero's Journey for a quest, or Three-Act, Save the Cat and others. Each card tracks the location and who's on the page.

  5. Write with continuity

    Chapters are written against recaps of earlier chapters and the closing passage of the previous one.

What holds a fantasy together

The places where your world's facts are kept, and the ways chapters draw on them.

  • A story bible

    Premise, setting, rules and notes in one place that every chapter draws on.

  • Locations on every card

    Each outline card names the chapter's main setting, so travel and geography stay consistent.

  • Recaps for continuity

    Later chapters follow what earlier chapters actually say, not only what the outline planned.

  • Arcs and speech

    A farm girl and a court mage shouldn't talk alike. Profiles record how each character speaks and how they change.

  • Series context

    On Pro, add up to five earlier books as context for the next one.

  • Your voice, not a generic epic

    A writing sample of up to 20,000 characters sets the prose style for every chapter.

Rules first, then story

Fantasy readers forgive almost anything except a world that cheats. If magic has a cost, it has to cost something every time. If the mountain pass is closed in winter, the army can't cross it in winter just because the plot needs them to.

That consistency is hard to keep across a long book and harder across a series. AIBookWriter keeps it in a few places. Your world's rules, places and factions go into the story bible, which every chapter draws on. Characters have profiles with motivations, arcs and the way they speak. Each outline card records where the chapter happens and who's in it. And as chapters are written, a recap of each one is saved, so chapter twenty is written against what chapters one to nineteen actually say, not just what the outline planned.

Series get one more layer. On the Pro plan, you can add up to five earlier books as context for a new one, so the sequel knows who died, who swore which oath and which city fell.

None of this replaces your judgment. Read each chapter with your rules in mind, and when something slips, fix it by hand or select the passage and ask for a rewrite. The whole-book review, on Plus and above, also flags continuity problems in its line edits, checked against earlier chapters and your story bible.

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Frequently asked questions

Can it keep my magic system consistent?

Write the rules into your story bible and they become part of the context for every chapter. Recaps of earlier chapters keep track of how magic has actually been used so far. Still read with the rules in mind: when something slips, fix it by hand or ask for a rewrite of that passage.

Does it work for a series?

Yes. On the Pro plan, a book can take up to five earlier books as context, so a sequel remembers the events, characters and promises from the books before it. The free series planner maps arcs across several books and the conflict that spans them.

Which fantasy subgenres can I choose?

Suggestions include epic, urban, dark, romantasy, cozy, grimdark, portal, fairy tale retelling, and sword and sorcery, and you can type your own. Subgenres sit alongside your tone, style and story elements, and together they shape the outline and the chapters. Choosing more than one is fine, such as cozy and romantasy together.

Will the prose sound like generic epic fantasy?

Not if you give it your voice. Paste a sample of your own writing, up to 20,000 characters, and chapters follow its rhythm and word choice. Tone and style settings, such as lyrical, sardonic or minimalist, steer it further, and the Literary tier gives the richest prose and subtext.

Can I build the world before I write?

Yes. The free world builder generates rules, places, factions and conflicts from a core concept, with options for magic level and scale, and the result can be saved to your book's notes. Find names that fit your cultures with the character name generator. The world builder gives 2 free runs an hour without an account.

How long can a fantasy novel be?

You set the chapter count and a target length for each chapter, and imported manuscripts can run to 200,000 words. For very long stories, consider splitting the work into volumes and using series context on Pro, so each volume remembers the ones before it. Recaps keep later chapters tied to the early ones.

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