ENHome for Later LifeA clear decision pathway to safe, independent livingPreview · 604 pagesTurn a worked-out idea into one coherent, full-length book.
Write your book with as much help as you need.
book·gpt writes manuscripts of up to about 90,000 words, chapter by chapter and in context. You set the structure and the length. Costs are shown before generation, and billing follows the actual usage.






Browse published previews
Five approved public books from the current app, with sharp local covers and a reading sample on each book page.
ENHome for Later LifeA clear decision pathway to safe, independent livingPreview · 604 pages
DEGut wohnen im AlterA guide to adapting, moving or rethinking later-life housingPreview · 502 pages
DEImmobilienmediationStructured conversations about a family propertyPreview · 309 pages
DEGenerationsberatungProperty transfer, usufruct, residence rights and inheritancePreview · 317 pages
DEWohnen im AlterStay, adapt, sell or move: a clear decision pathPreview · 313 pagesThree ways to write
You decide. Keep writing yourself or hand over the parts where you want help.
Write it yourself
Bring your own text and keep control of every word.

- Import a DOCX or Markdown file
- Review the detected chapters
- Continue writing in the editor
Characters, places and timeline: in preparation.
Write together
Write your own text and accept only the suggestions that fit.

- Import text or source material
- Review the suggestion beside your text
- Accept or reject the change
Have it written
Set the brief and let book·gpt write the manuscript.

- Set the topic and audience
- Choose the length and review the estimate
- Have the book written
Every package includes all three ways to write. The difference is how much book·gpt writes.
Watch a structured idea become a book.
Enter a topic and audience, review the outline, then follow the manuscript chapter by chapter inside book·gpt. The public demo opens here as soon as the production workflow has passed its final checks.
Open the live demo- 01Set the brief
- 02Review the outline
- 03Follow the book build
One book, three tangible steps
Pick a step. These icons are a short tour through the product, not decoration.
Your outline remains the backbone
Start quickly from a topic or bring your own outline. Chapters, sequence and target length stay visible and editable.
- Quick start or custom structure
- Cost check before writing
Covers stay replaceable
The original cover remains available as V1. New Gemini variants appear as V2, V3 and onward, each with a creation date and selectable in the editor.
- V1 stays available
- Version and date per cover
One manuscript leaves in three formats
EPUB for e-readers, KDP DOCX for upload and a typeset print PDF are produced from the same content.
- 17 KDP trim sizes
- Lead magnet and large print
The costs come first
Before each run, book·gpt prices the job and shows an estimate. Writing starts only after you have seen the number. Afterwards, the actual usage appears right next to it.
Subscription tools often bury usage inside a monthly plan. Here you see estimated credits before the run and actual credits afterwards.
Visual Edition: one manuscript, fully typeset
For consultants, coaches and associations who use a book to build trust: as a talk handout, as a lead magnet on the website, or as a printed guide. The same content can be typeset into several print-ready editions.
And because many readers are past 60, the same content also ships as a large-print edition: bigger type, calm line length, verified contrast.
Lead magnet edition
Compact A4 layout for websites and talks.
Open PDF ↗Large print edition
The same content, typeset for older readers.
Open PDF ↗Both PDFs come from the same manuscript. The sample guide is in German; the pipeline writes English books the same way.
Three exports, one manuscript
For e-readers and the KDP ebook track.
Manuscript in 17 trim sizes for the paperback upload.
Typeset layout, available in large print.
Files for your KDP upload
You receive EPUB and DOCX files for the upload. A print PDF is included too. Final approval stays with you.
AI-generated text must be disclosed to KDP. book·gpt supplies the disclosure details for each book.
Pricing
One-time prices per book, no subscription.
Manuscript
€39
one-time- Complete book text up to about 90,000 words
- KDP DOCX in 17 trim sizes
- EPUB
Visual Edition
€99
one-time- Everything in Manuscript
- Swappable cover with V1/V2 history
- Large-print typesetting and lead magnet layout
- Print PDF
Business
€149
one-time- Everything in Visual Edition
- Additional generation headroom
- Use in client projects
Every package includes the generation budget for one book. You see the estimate before each run.
Common questions
How long can the book be?
Up to about 90,000 words, the size of a grown non-fiction book. Shorter formats such as a 50-page guide work just as well.
Which languages does book·gpt write?
Six book languages, including English and German. The interface is available in English and German.
How long does generation take?
Usually under an hour, depending on length. While it runs, you can watch which chapter is being written.
Who owns the finished book?
You do. Sell it, give it away, or publish it on Amazon KDP. book·gpt supplies the AI-generated content disclosure details for each book.
Start your book project
Choose your package and open book·gpt. You see the price and included credit before you buy.
No account is created. We only save your email for the book·gpt launch.
Open the app and start