Privacy

Last updated 13 August 2026

Book Builder is a tool for turning material you already own into a book. That means you hand it things you care about — draft chapters, research, client documents, recordings of your own voice. This page says plainly what happens to them.

The controller of your personal data is [LEGAL ENTITY], [ADDRESS]. Questions, requests and complaints: [CONTACT EMAIL].

What is stored

• Your account — email address, a hashed password (we never store the password itself), and a verification code while you're confirming the address.
• What you upload — the files themselves, plus the text extracted from them so the AI can read them.
• What you make — book chapters, titles and settings, generated images, chat history with the assistant, and the notes it keeps about your book.
• Your subscription — plan, status, and identifiers from Stripe. Card details are never sent to or stored on our servers.
• Usage counters — how many pages you generated in a calendar month, so plan limits can be applied.
• Server logs — ordinary technical records of requests, kept short-term for debugging and abuse prevention.

Who else sees it

Your material is shared only with the services needed to run the product, and only for that purpose. It is never sold, and never used to advertise to you.

Service	What it receives	Why
Anthropic (Claude)	Your sources and book text	Writing, editing and answering questions about your book
Google (Gemini)	Image prompts you write	Generating illustrations and covers
Stripe	Email and payment details you enter with them	Subscriptions and card processing
MailerSend	Your email address	Sending verification codes
Hosting & database	Everything above, at rest	Running the service ([HOSTING PROVIDER / REGION])

These providers are located in or transfer data to the United States. Such transfers rely on the European Commission's standard contractual clauses or an adequacy decision, as applicable.

This site also loads fonts from Google Fonts, which means your browser contacts Google when a page opens and Google receives your IP address.

What it is not used for

Your uploads and your book are not published, not shared with other users, and not used by us to train AI models. Sending your text to Anthropic and Google is what makes the book get written; it is not a licence for us to do anything else with it.

How long it is kept

Your account and its contents are kept for as long as the account exists, because a book is a project you come back to. You can delete any uploaded source file yourself, at any time, from the sources list — the stored file is removed with it. To have your account and everything in it erased, write to [CONTACT EMAIL] and it will be done.

Your rights

Under the GDPR you may request a copy of your personal data, correct it, have it erased, restrict or object to processing, and receive it in a portable form. Write to [CONTACT EMAIL]. You also have the right to complain to your supervisory authority — in Sweden, Integritetsskyddsmyndigheten (IMY).

We process your data to provide the service you asked for (performance of a contract), to meet legal obligations such as accounting, and — for security logging and abuse prevention — on the basis of our legitimate interest in keeping the service running.

Cookies

One cookie, holding your login session. It is set when you log in and cleared when you log out. There is no advertising or third-party tracking on this site.

Changes

If this page changes in a way that matters, the date at the top changes and you'll be told before it takes effect.