For novels, novellas and short stories
Write the book. Keep the whole story in view.
Author keeps your manuscript, your cast and the strands woven through the book, and from them it works out where every character is, what they know and what has happened to them, at any moment. Eleven checks catch the seams. Your own AI can write with you.
Request access See how it works
Early access, invite-only. No built-in AI: on Premium and Max your own AI (Claude, ChatGPT, Grok) works on your books through Geenius OS. The windows on this site show a fictional novel and sample numbers.
Your manuscript leaves whenever you wantMarkdownDOCXEPUBprint PDF
What it does
Write. Track. Check. Share.
Long stories fail in the seams: a character in two places at once, a secret learned twice, a storm that ends before it starts. Author holds the seams so you can write.
Write
Parts, chapters and scenes in Markdown, with status, word counts and a time and place for each scene.
The manuscriptTrack
Events change people. Author replays them in story order, so every character's state is one question away.
The story engineCheck
Eleven continuity rules run on every change: bilocation, travel, the dead, knowledge, weather and more.
The checksShare
Versions with word diffs, beta-reader links with comments on the paragraph, and four export formats.
Readers and export
The story engine
Where is she, and what does she know?
Mark what happens as events: a journey, an injury, a secret learned, a relationship turned. Each event has effects on a character's state. Author folds them in story order, so the state at any scene or time is worked out, not remembered, and every change says which event caused it.
- Location, injuries, what they know, possessions, mood, relations
- The same story always gives the same answer
- Compare a character between two moments
Continuity
Rules, not a model.
The checks are deterministic: every issue is a rule broken, with the scenes, events and characters that break it and a scene to jump to. Dismiss one and undo brings it back. Flashbacks, dreams and memories are exempt from the presence rules.
- Bilocation, travel too fast, the dead reappearing, age drift, order of time
- Point of view not present, knowing too early, one object in two places
- Travel is measured against the routes on your maps
Strands and time
From the whole book to five minutes.
Strands carry the plot, the arcs, the mysteries and even the weather. See which threads carry each chapter and which go quiet, then zoom the timeline from the year down to the minute.
- Ten kinds of strand
- Story time or reading order, empty stretches folded away
- Six outline templates as a ready-made structure strand
A door for your AI
Your AI writes with the book in mind.
On Premium and Max, connect Claude, ChatGPT or Grok to Geenius OS once. Your AI can read the outline, ask for a character's state before it drafts a scene, write the scene into your manuscript, save a version first and run the checks afterwards. There is no model inside Author.
- Books, scenes, cast, strands, events, story, maps, versions, readers and export
- Optimistic concurrency: it cannot overwrite a newer edit of yours
- Through Geenius OS, with the permissions you set
In numbers
Facts you can check, not testimonials.
Author is in early access and has no public customers yet. These are things you can look up in the app and the docs today.
- 11deterministic continuity checks
- 5zoom levels on the timeline, year to minute
- 10kinds of strand, from plot to weather
- 4export formats: Markdown, DOCX, EPUB, print PDF
Honest labels
What works today.
We say what is live in early access, what needs a plan, and what is not offered.
- Pre-betaManuscript, cast, strands, events, timeline, checks, versions, readers, maps, exports
Built and in the app now. Early access is invite-only.
- Pre-betaYour AI on your books
Works through Geenius OS and needs Premium or Max (or a Geenius OS plan that includes Author Premium).
- Pre-betaCast from Geenius OS profiles
Optional. You can also create a character, place or object in Author itself.
- Not offeredA built-in AI
There is none. Author never writes your book; your own AI can, if you connect it.
- Not offeredA phone app or live co-writing
Not offered. Author is a web app.
Who writes here
For stories that outgrow their notes.
Novelists
The strands view shows which threads go quiet; the state view tells you what a character can know in this scene.
See the setupSeries and serial writers
Keep a cast and a world across books, a version per episode and a reader link for each release.
See the setupWriters with an AI
Your AI reads the outline and the state before it drafts, and the checks after. You stay the author.
See the setupEditors and writing groups
Send a frozen version, read comments on the exact paragraph, and see what changed between rounds.
See the setup
Pricing
Three plans. No free tier.
Per month, in euros. Included in the matching Geenius OS plan. Payments are in test mode during early access.
- €9Pro: the whole writing room, 25 books
- €19Premium: 50 books and your own AI connected
- €49Max: unlimited books and your own AI connected
From the blog
Notes on long stories.
Why long stories break in the seams, and how to check for it
The continuity errors that survive editing, why they happen in long books, and the small set of rules that catch most of them without reading the text.
Track what your characters know: events, not notes
A practical way to keep a secret straight across a novel: write it as events with effects, so a character's knowledge at any scene can be asked for instead of remembered.
A timeline you can zoom from the year to the minute
Why a story needs both a long view and a short one, how folded gaps and reading order help, and how to use the zoom levels in practice.
Questions
Good questions.
What is Author?
A web app for writing books, novellas and short stories. It keeps the manuscript (parts, chapters and scenes in Markdown), the cast, the strands woven through the book and the events that change each character. From those it works out every character's state at any moment, draws a timeline, runs continuity checks, saves versions, makes beta-reader links and exports to four formats.
Is Author ready to use?
It is in early access: invite-only, with payments in test mode. The parts described on this site are built and in the app. We let people in a few at a time, so request access and we write when your place is ready.
Does Author write the book for me?
No. Author has no built-in AI. On Premium and Max you can connect your own AI (Claude, ChatGPT or Grok) through Geenius OS, and it can read the book, draft scenes into your manuscript and run the checks. What goes in the book is your decision.
Is my manuscript mine?
Yes. Scenes are plain Markdown and export to Markdown, DOCX, EPUB and a print PDF at any time. There is also a data export of everything in your account.
Do I need Geenius OS?
No. Author is a standalone app with its own account and plans. A paid Geenius OS plan includes the matching Author plan. Geenius OS profiles are an option for your cast: you can also make characters, places and objects in Author itself.
How does Author know where a character is?
From what you tell it: events with effects (a journey, something learned, an injury), the facts of the cast, and the last scene the character was in. It folds them in story order. The same story always gives the same state, and each change names its event.
Your story, all of it, in one place.
Author lets people in a few at a time. Ask for a place and we write when yours is ready.