Book Sage
The guided AI platform that takes you from blank page to published book — manuscript, cover, marketing, and audio in one flow.
Turn your book idea into a finished manuscript, cover art, marketing assets, and audio chapters — all guided by AI. From outline to published, in one platform.
From £180/yr
Book Sage
See pricing- Replace ghostwriters, cover designers, copywriters, and narrators with one subscription
- Five book-type schemas + unlimited custom types for any genre
- Reusable author personas keep every book on-voice
- Marketing pack ready on publish day: blurb, hooks, ads, social
- Chapter-level narration via your own ElevenLabs key
- Export to DOCX, EPUB, PDF, and bundled audio
Sound familiar?
If any of this describes your Monday morning, you're in the right place.
You've had the outline in a Google Doc for 18 months and haven't written chapter two.
A ghostwriter quoted £6,000 and wanted six months. You haven't decided if the book will even sell.
You can write, but the cover, blurb, and launch copy aren't in your wheelhouse — and paying separately for each kills the economics.
The contrast
The old way. The Book Sage way.
Same job. Different toll on your time, budget, and data ownership.
- Ghostwriter quotes: £3k–£10k, 3–6 monthsGuided AI drafting in your voice, any timeline
- Separate tools for writing, cover, marketing, audioOne platform, one subscription
- Blank-page paralysisChapter-by-chapter scaffolding with suggestions
- Generic author photo + stock coverAuthor-persona modelling + branded cover concepts
- Separate narrator + studio for audiobookAI narration with voice presets (Author tier+)
What if the book that's been in your head for two years could be on Amazon by next quarter — without a ghostwriter, a cover designer, or a marketing agency?
The core four
Four reasons this is the last tool you'll install.
From fuzzy idea to full outline in an afternoon.
Start with a topic and a target reader. The assistant interviews you, proposes three outline variants, and you pick the arc that fits. No staring at a blank page.
Draft chapters in your voice, not a generic AI voice.
Upload a sample of your existing writing — blog posts, emails, a half-finished manuscript. The model learns your cadence and vocabulary before it drafts a single paragraph.
Cover, blurb, and launch copy come out of the same flow.
Book done isn't book launched. BookSage generates cover concepts, Amazon-ready blurbs, newsletter announcement copy, and launch-day social posts — all from your finished manuscript.
Ship an audiobook without renting a studio.
Author and Studio tiers include AI narration with voice selection. Export chapters as broadcast-quality MP3 — ready for ACX, Spotify, or your own platform.
How it works
From zero to first result — under 10 minutes.
Answer the interview
Topic, reader, tone, length. 10 questions, takes 8 minutes.
Pick your outline
Three outline variants generated. Edit or approve.
Draft, revise, publish
Generate, edit, and export to your preferred platform.
Everything that's in the box
There's more here than you'll hit in year one.
Below is the full feature list. Scan it. If anything on this list would save you a morning, the free plan is your next click.
Ideation
Guided idea interview
5 built-in book-type schemas
Fiction, educational nonfiction, conversational, business, coloring books.
Custom book-type builder
Define your own schema, tone, and per-stage AI prompts.
3-variant outline generator
Outline Creator + Audience, Scope, and Flow reviewers.
Reader persona modelling
Writing
Chapter-by-chapter drafting
Author-voice fine tuning
Inline revision suggestions
Multi-language output
Packaging
Cover concept generator
Blurb & back-cover copy
Marketing
Launch email sequence
Social post pack
Audio
ElevenLabs narration (BYOK)
Connect your own ElevenLabs key for chapter-level voice generation.
Chapter-split MP3 export
Export
DOCX / EPUB / PDF export
Autosave & version history
Built for you
Self-select your scenario.
If you see yourself in one of these, the rest of the page is for you.
You have the expertise but have never written a book. You need scaffolding, not a blank page.
- Ship a draft you're proud of
- Learn the structure as you go
- Skip three separate tool subscriptions
You publish 2–4 books a year. Switching between ghostwriter, cover designer, and launch copywriter costs time and margin.
- Consolidate your stack
- Cut cycle time by 40%+
- Keep creative control end-to-end
Your book is a lead magnet. You care about the outcome, not the craft.
- Focus on the core ideas
- Ship in weeks, not quarters
- Launch with a full asset pack ready
Build vs buy
Build it in-house, or skip to the finish line?
400–800 hours of your own writing time
Approx. £3k–£10k (ghostwriter) + £300–£1,500 (cover) + £200–£800 (copy) in dev cost
Plus rewrites if the first draft misses the mark.
Install in 2 minutes
Subscribe and go. We host it.
Replace three vendors with one subscription. Start from £19/month.
Technical spec sheet
Everything a developer wants before installing.
Server requirements
- Hosting
- SaaS — we host it
- Browser
- Modern Chrome, Firefox, Safari, Edge
Tech stack
- Backend
- Laravel + MySQL + Redis
- Frontend
- TypeScript (React)
- AI providers
- OpenAI + Anthropic (behind the scenes)
Compatibility
- Export formats
- DOCX, EPUB, PDF, MP3
- Distribution
- Amazon KDP, ACX, Apple Books ready
Honest limitations
- Not a publisher
- We generate the assets — you distribute them
- Not a grammar check replacement
- Editor-pass before publish still recommended
Support policy
What we help with (and what we don't).
Clear expectations up front. Unclear expectations are the single biggest reason digital products get bad reviews.
Included
- Bug fixes and security patches
- Answers to product questions
- Compatibility patches for supported WordPress, PHP, and browser versions
- Help upgrading between plugin versions
Not included
- Custom development or bespoke feature work
- Installation on your server (install guides are provided)
- Teaching how to code or how WordPress works
- Third-party integration work we do not officially support
- Support for nulled or cracked copies
Refund policy
7-day money-back guarantee on first purchase. Cancel anytime.
Monthly subscription. Full refund within 7 days of first purchase if AI credit usage is limited; pro-rated refund of unused credits otherwise. Renewals are non-refundable; cancel before your next billing date to avoid the next charge. Consumed AI usage is always non-refundable.
14-day money-back
Full refund if it doesn't fit.
Cancel any time
Keep access through end of period.
Pricing
Simple, honest pricing.
Subscription. 7-day money-back guarantee.
Up to 1 user sites
- 1 book in progress
- AI outline + drafting
- Cover concepts
- Export to DOCX / EPUB
Up to 1 user sites
- Unlimited books
- Marketing asset pack
- Author persona modelling
- Priority support
Up to 5 users sites
- Everything in Author
- Team seats
- Audio narration credits
- White-label exports
Questions, answered
Frequently asked
Can I edit what the AI drafts?
Will the book sound like AI wrote it?
Who owns the book?
Do you offer refunds?
A note from the founder
"I built SAGE GRIDS because my own agency was paying hundreds a month for tools that did 30% of what we needed. If that's you, the money-back guarantee is my way of saying: try it before you trust me."
— Ilyas Serter, Founder, SAGE GRIDS
Changelog
Show 2 releasesHide changelog
- NewAuthor-voice training from uploaded samples
- NewCover concept generator (3 variants per book)
- NewOpen beta — manuscript drafting flow
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