Novel writing software for long books, sagas, or sprawling worlds

Write the book in your head.

Muse is a writing environment for novelists working on long books. Every chapter, every character, every choice stays in context. The book you finish is still the one you set out to write.

Keep meaning. Keep momentum.

Closed beta · 30 days free · No credit card required
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Master Plot
Act 1
The Horizon
The Guarantee
Burned Bridges
Marching Ahead
Riley
Heather
James
World Backstory
Riley & Heather
Burned Bridges
B I U
H1 H2
2,808 words  ·  Ctrl+Enter to continue

Polaris cut corners on Edison wherever they could, but it appeared that employing a "Bereavement Advisor" had been considered a necessary investment. Which probably said more about the number of work-related accidents on Edison than it did about the corporation's concern for its colonists.

One thing Polaris apparently wouldn't spring for was chairs in a waiting room. Riley swayed from side to side, staring at the back of the head of the woman in front of him in the line. She was hunched in on herself, head buried in a scrap of cloth, crying in a snuffly, embarrassed kind of way.

Riley wasn't crying. He wasn't sure he knew how to. Something inside of him had been sucked out. A hatch failing on his soul's airlock.

What does Riley believe about himself right now?
At this moment, Riley's core belief has just collapsed: that his real life begins the moment he escapes Edison. The college plan was his entire identity. With his father gone, he's not grieving a person yet. He's grieving the future version of himself that no longer exists.

He hasn't named this yet. He's numb. The grief comes later.
Ask Muse...
What it actually changes

Open a new chapter. Muse already knows your book.

Every character. Every place. Every thread you've left hanging. By the time you sit down, Muse has read all of it. You just open the chapter and write.

Always in context

The character who went flat, and you hadn't noticed.

Ask Muse to read a chapter. It tells you when a character has drifted from who you established them to be, and points to the line where the depth started leaking out.

An editor who's read every page

Find out who your character is before you write them.

Every character has an inner shape: what they want, what they actually need, the lie they tell themselves. Ask them questions. They answer in their own voice, from where they stand in the story right now.

Talk to your characters

If your novel feels off by chapter twenty, the story isn't broken. A long book is too big to hold in your head. You remember what you intended, not what's actually on the page. Muse remembers what's on the page.

Beyond chatbots

Meet Pixie Dust.

An intelligent narrative engine. Muse is the writing environment. Pixie Dust is the reader inside it. A living encyclopedia of your world. A content editor available at 2am. A storytelling coach for plot and arc. A reader who never forgets a page. So you can focus on the craft.

Why call it Pixie Dust? Because "Stateful Orchestration Engine with Deterministic Narrative Alignment and Agentive Memory Layer" didn't fit on the button.

Pixie Dust does its own homework. It reads your chapters, follows your characters, draws lines between what you wrote last week and what you wrote three months ago. Every character, every detail, every thread: connected and ready before you ask the question.

Pixie Dust reads, remembers, and points things out. The book on the page stays yours.

Writing a book is a mix of hard work and a little bit of magic.
We provide the engine. You provide the magic.

Inside Muse

The craft tools come first.

Muse gives you the bones of a long book: the story's shape, each character's arc, the world they live in, the days that stack up into a manuscript. Pixie Dust reads all of it, every time you ask Muse a question.

Master Plot · 12 beats
Act 1
Act 2
Act 3
Act 4
Story shape

Plan it, or discover it as you go.

Some writers plot first: every beat laid out, the story broken into acts, every chapter sketched before they begin. Others find the shape through the writing. Muse handles either, with the same craft thinking under both.

Riley · Protagonist
Lie
Ghost
Want
Need
Tactic
Mask
Crisis
Change
Character arcs

More than a name and a face.

Every character carries the elements of a real arc: the wound that shaped them, what they want, what they actually need, the lie they tell themselves. You can see, at a glance, which characters live on the page and which are still placeholders.

Arm of Orion · world
Marines Trilogy
Book 1Book 2Book 3
Standalone
Edison Days
World

One world. Many books.

A trilogy, a series, a universe of standalones. Muse holds your world the way you'd hold it on a shelf. Characters and lore live wherever they fit: shared across a series, or tied to a single novel. As your world grows, it stays browsable: locations, factions, lore, artifacts, plot threads.

This week · 4,820 words
M
T
W
T
F
S
S
Writing days

The days that stack up.

Every word you write becomes part of a day. Streaks, totals, the curve of a manuscript taking shape. There when you want to look. Quiet when you don't.

Logline
A grieving colonist enlists in the Marines, and finds the only family that will stay is the one he has to bleed for.
.docx.mdPDF
Book

From first draft to finished manuscript.

A logline and back-cover blurb that sharpen as the story does. Export the manuscript as Word, a single chapter as Markdown, or a reference PDF of your world to hand to an editor or co-author. Your book leaves Muse the way you want it to.

The World Bible

An encyclopedia of your world.
Built while you write.

Pixie Dust reads every chapter, every character note, every place you've named. It builds a living reference of your world for you, and keeps it current every time you sit down to write.

The Arm of Orion · World Bible
World Bible · Built as you write
The Arm of Orion
A living reference for your world. Pixie Dust reads what you've written and keeps it current, so you don't have to maintain notes in another file.
Character
Riley O'Ryan
Believes his real life begins the moment he escapes Edison. His father's death destroyed the only route he'd planned.
Location
Edison Station
A cramped, ageing space habitat in the inner system. Run by Polaris Corp. Riley has never known anywhere else.
Faction
United Worlds Military
The institution Riley enlists in as his only path forward. The Marines will become his unlikely home.
Lore
Polaris Corporation
Controls most habitats in the inner system. Employs Bereavement Advisors as a cost of doing business, not compassion.
World Bible
A living reference for your manuscript. Pixie Dust reads what you write and keeps your bible current for you.
255
Entries
Characters 34
Locations 48
Factions 50
Lore 29
Drawn from your chapters, characters, and worldbuilding documents. Updated every time you write.
What Muse does

Built for the long book.

01

It knows your world.
Every session.

Ask about a tiny character detail from book one while you're writing book three. Pixie Dust has read everything you've put in. The answer is already there.

A writer asked Pixie Dust who his protagonist's mother was. The answer came back from a passing reference in chapter two, a detail he'd long forgotten he'd written.

Muse · AI Panel
Who is Riley's mother, and why did she leave?
His mother is a ghost in his life. She took a transfer off-station years ago and chose never to return to Edison or her family once she found a better life elsewhere. Riley has never spoken about this directly, but it confirms his core belief: whatever is worth having exists out there, and even people who love you will not come back for what's left behind.
Does this affect how he thinks about Heather leaving?
Deeply. Heather's rejection at the party mirrors his mother's departure: someone he loves choosing a better future over him. He won't consciously connect these, but the pattern is there. Worth making that echo explicit somewhere in Act II.
02

It reads like
an editor.

Ask for a read on a chapter. Pixie Dust tells you when a character is acting against the person you've established, and points to the line where the depth started slipping. The kind of note an editor would give you, on a chapter that's still warm.

A developmental editor reads your book once and moves on. Pixie Dust has read every page, and it's there at 2am when the scene won't come together.

Muse · Editor
Chapter 8 feels off but I can't put my finger on it. Take a look?
There's a consistency issue worth looking at. In Chapter 3 you established that Riley reflexively refuses help. It's one of his defining traits. In this scene he accepts assistance without hesitation. That shift hasn't been earned yet. His arc crisis, the moment he admits he can't do it alone, belongs later.
Is that the only thing?
One thing at a time. Want me to flag the next?
03

Talk to your
characters.

Every character has an inner shape: what they want, what they need, the lie they tell themselves. Ask them questions. They answer in their own voice, from where they stand in the story right now.

Find a character's voice before you write them. Test how they'd react to a scene that hasn't happened yet. A writer who knows their character writes them better.

Muse · Talk to Riley
Age 19 Origin Edison Station Faction Polaris colonist Build Wiry, restless Status Pre-enlistment
Do you think you'll ever come back to Edison?
Come back? No. There's nothing here worth coming back to. Some people are built for places like this. I'm just not one of them.
What about your father?
That's... different. He was supposed to come with me. In a way.
Why Muse exists

Two years into a novel of my own, I ran the Arc Builder on my protagonist and saw what I'd been doing for three drafts. I had traded meaning for entertainment. I'd flattened him without knowing.

Muse is the tool I wish I'd had four years ago.

the creator of Muse

Pricing

One price. Every feature.

Every plan starts with a 30-day free trial on full Pro access. Every feature, every AI tool, on every tier.

Writer
$14.99
per month
  • 150 AI credits per week
  • 40 credits per session
  • The full Muse environment
  • Editor read-throughs
  • Character chat
  • Voice profile
  • Plot builder
  • Living World Bible, refreshed a few times a day
Max
$59.99
per month
  • 600 AI credits per week
  • 150 credits per session
  • Everything in Pro
  • World Bible refreshed in near real time

30 days free. No credit card to start.  ·  Every feature on every tier.

Keep the book in your head.

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