21d • BookNova.ai stuff
✨ New: Rewrite any part of your book with a single instruction
Hey everyone,
I just shipped something I'm genuinely excited about, and I think it's going to change how you polish your books inside BookNova.
Up until now, if you wanted to change a sentence or a scene, you either edited it by hand or regenerated the whole chapter. Today I'm giving you something far more surgical: you can now rewrite any specific piece of text just by selecting it and telling the AI what you want.
Here's how it works:
Highlight any sentence, line of dialogue, or paragraph in your chapter (just drag your mouse over it).
A small Rewrite button pops up right above your selection.
Click it, and a box slides open. The text you picked stays highlighted, so you always know exactly what's about to change.
Type an instruction for how you want it rewritten — or leave it empty for a standard rewrite — and hit Rewrite.
That's it. The AI rewrites only the part you selected, in your book's language, using the same model that wrote the chapter — so it blends right in with the prose around it.
The real power is in the instruction box — this is where you direct the scene like a showrunner. A few examples of what you can actually type:
"Give her dialogue a sharper, more sarcastic edge — she's hiding how scared she is."
"Rewrite this fight so it's chaotic and close-quarters instead of clean and choreographed."
"Add a beat of physical tension between them before he answers."
"Make the villain's threat quieter and more menacing — no shouting."
"Switch this from telling us he's grieving to showing it through small actions."
"Slow this moment down and stretch the suspense right before the door opens."
"Layer in sensory detail — what the tavern smells and sounds like."
"Plant a subtle hint here that she's lying, without giving it away."
"Deepen the POV so we're fully inside his head during the betrayal."
You can get as specific as you like — name the character, the emotion, the stakes. The more precise your direction, the closer the result lands to the scene in your head.
I built this because I kept hearing the same thing from you: "I love this scene, I just wish this one moment hit harder." Now you can fix exactly that — without disturbing the rest of your chapter.
Go try it on your current manuscript and let me know what you think. I'd love to see the instructions you come up with — drop your best ones in the comments. 👇
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✨ New: Rewrite any part of your book with a single instruction
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