By Jesse Wood, founder of Build Until Publishing · November 10, 2026 · 7 min read
To make your book sound like you, not AI, start by describing how you actually talk, then read every chapter out loud, mix short and long sentences, and cut stock phrases that make writing sound generic. Check the pages against your own voice, not against an AI detector, because detectors are unreliable.
This matters whether or not you used AI. Plenty of human writing sounds flat and polished in the same way, and readers can tell when nobody is home on the page.
Describe it in writing first. You can't protect something you haven't described. Take a few pages you wrote when you weren't trying to impress anyone, like an email to a friend, a voice memo transcript or a post you're proud of. Then write down:
That's a voice profile. It becomes the yardstick for every chapter. If you'd like one built from your own writing, the free plan at our start page includes it. We call this tool the Voice Lab, and everything else in the system works from it.
Because your ear catches what your eyes skip. This is the oldest trick and still the best. Read a chapter at normal speed. Mark every spot where you stumble, run out of breath or feel a little embarrassed. Those are the spots where the writing isn't yours.
Ask of each sentence: would I say this to a friend across a table? If not, say what you mean the way you'd say it, then write that down.
Mix short and long ones on purpose. Machine-written text tends to run at one speed. Every sentence is about the same length, with the same rhythm. Human writing jumps around. A long sentence builds, wanders a little, picks up a detail. Then a short one.
To check yours, pick a page and count the words in each sentence. If they all land between 15 and 22, break the pattern. Cut one in half. Let one run long. Use a fragment now and then. Our Human Test looks at this too. It measures how much your sentence lengths vary, and flags pages where everything runs at one pace.
Cut the ones you'd never say out loud. Some phrases show up in machine text far more than in real speech. Here are categories to watch for, with examples that have nothing to do with you:
| What to cut | Examples |
|---|---|
| Grand openers | "Imagine a world where," "Look no further" |
| Padding verbs | "plays a crucial role," "a wealth of," "a plethora of" |
| Brochure words | "cutting-edge," "comprehensive," "world-class" |
| Signpost transitions | stacking "however," "ultimately," "importantly" every few lines |
| Tidy wrap-ups | a last paragraph that restates what you just said |
Also watch your punctuation. A page full of long dashes is a common tell. A period or a comma almost always works better.
Replace each one with what you'd really say. "Plays a crucial role in your success" becomes "matters." "A wealth of resources" becomes "a lot of good stuff."
Specific details from your own life. A machine can't give your reader the smell of your grandmother's kitchen or the exact thing your first boss said. Add specifics only you know: names, places, numbers you remember, the detail that surprised you. One true detail beats three polished sentences.
It can help you edit, but it can't give a verdict. Build Until Publishing includes a Human Test that runs on your chapters. It's a local pattern check, not an outside service. It looks for stock phrases, sentence-length variety, long dashes and signpost words, and gives a score from 0 to 100 with notes on what to fix. It's a guide for your own editing. It's not a verdict on you.
Be careful with any tool that promises to detect AI writing. Detectors are unreliable. They can flag writing that a real person wrote, especially plain prose or English written by someone who learned it as a second language. They can also miss text a machine produced. We don't send your manuscript to outside detectors, and we'd suggest you not bet your book on one either. Your ear, your profile and a few trusted readers are better judges.
Six steps, in this order.
If you used AI along the way, your disclosure to Amazon is a separate question, and we cover it in its own post. Once the voice feels right, get your files and cover ready with our step-by-step Amazon guide. And if you want company while you revise, Build Until is the community behind our house.
Ready to hear how you sound on the page? Start free and get your Voice profile and the Acquisitions Board's read on your idea.
Read it out loud, vary your sentence lengths, cut stock phrases and add specific details only you know. Compare every chapter to a description of how you actually talk.
No, they're unreliable. They can flag text that a real person wrote, especially plain or second-language English, and they can miss machine-made text, so don't treat a score as proof.
It's a short description of how you write and speak: your words, signature phrases, things you'd never say, how you open and end a thought, and your humor. You use it as a yardstick when you edit.
It's a local pattern check for stock phrases, sentence-length variety, long dashes and signpost words. It gives a score and edit notes, and it's a guide, not a verdict.