Most authors assume their publisher fact-checks non-fiction. Trade publishers largely do not — the author warranty in a standard contract makes accuracy contractually yours. This pulls every checkable claim out of your manuscript and flags the ones carrying no source.
Tool
Claims, quotes, dates and statistics validated
What it does, precisely
- Checks claims, quotations, dates and statistics against sources
- Flags quotes that are widely repeated but wrongly attributed
- Identifies statistics presented without provenance
- Verifies against religious and historical corpora where relevant
Free opening chapter review — on your own pages
Paste or upload up to 5,000 words. You get back what the opening appears to promise, what is already working, where a reader may hesitate, and the three priorities worth fixing first. Free, private, no card.
This is an AI-assisted snapshot, not a human edit. You decide what belongs in the next draft.
What it does
Particularly strong on scripture and historical quotation, where corpus verification means a citation is checked against the actual text rather than against what the internet believes it says.
What this looks like in your genre
memoir. Memoir gets latitude on interior experience and none on checkable external fact. Readers accept that you remember an argument differently from your sister; they do not accept that the strike was in 1985 when it was 1984.
business. Business writing has the highest claim density of any category and the worst provenance. Statistics travel between books and articles, mutating on the way, and a figure you read in a newspaper is very often a misreading of a study.
non fiction. Trade publishers largely do not fact-check, and the author warranty makes accuracy contractually yours. The extraction produces the claim list a professional checker would spend their first billable hours building, ranked so you start with what matters.
textbook. A textbook's factual standard is higher than any other category, because students will learn what it says and lecturers will be blamed for it. The extraction covers claims, figures, data in tables and the permissions position for anything reproduced.
travel. Travel readers who know the place will write to you, and they are your most engaged readers. The extraction covers place names, distances, dates, historical claims and anything about a local business or institution — the details that establish whether you were paying attention.
However you write
Checks claims in any manuscript. Uploaded non-fiction written over several years is the highest-risk case — the statistic that was current when you wrote chapter two often isn't by the time you finish.
The mistake: trusting the version you remember
One wrong date in a memoir is forgivable. One misattributed quotation in a business book is the thing a reviewer leads with, and it quietly undermines everything around it that was correct.
The dangerous claims are not the ones you were unsure about — you checked those. They are the ones you were certain of: the famous quote everybody knows, which the person never said; the statistic that was right in 2019; the date you have repeated so often it has stopped feeling like a fact and started feeling like a memory.
What Your Book Pro does here
Your Book Pro is a writing studio for people making a real book. You bring the words — typed straight in, dictated if you'd rather talk, or uploaded from whatever you have already written elsewhere — and it does the work that normally costs thousands: structure, editorial feedback, proofreading, a cover, and a publisher-ready export.
One rule shapes all of it. Your words are stored as Exact Text and are never overwritten. Every suggestion arrives attached to a place in your manuscript, and nothing changes until you accept it. Where most AI tools quietly rewrite you into their own register, this one shows you the change and waits. Even the automatic clean-up pass is held to a length check — if it drifts too far from what you actually wrote, the edit is thrown away and you keep your own words. The editorial standards behind the feedback are our own, written for books and specific to your genre, not a general chatbot answering in a good mood.
Fact Check verifies claims, quotes, dates and statistics — and is particularly strong on scripture and historical quotation, where citations are checked against the actual corpus rather than against what the internet believes it says. Included in Pro.
It checks what is checkable. It cannot verify your private memory of a conversation in 1974, and it doesn't pretend to.
Where it stops
It checks what is checkable. It cannot verify your private memory of a conversation in 1974, and it should not pretend to. For contested public history, a subject specialist is still worth the money.
Where to find it
Fact Check runs in the Editing Suite on the Edit tab and saves its findings to the book, so you can act on them chapter by chapter. Ask the Editor — the pill in the top right — can quote that saved report back to you while you work.
What this replaces
| What you are buying | Typical range | Notes |
|---|---|---|
| Professional fact-checker | £600–£2,000 for a claim-heavy non-fiction book | Priced per hour or per claim; trade publishers rarely provide this for non-fiction. See /costs/fact-check-citations for the full breakdown and sources. |
Run a fact check
Review my opening