Publisher information

Privacy

Orders and delivery

The application stores your checkout reference, email address, purchased edition, amount and purchase date in Cloudflare D1. Private books are stored in Cloudflare R2. Stripe processes payment information. We do not receive or store card numbers. Resend sends transactional sign-in and purchase emails containing your email address and private access links. These messages are not marketing.

Essential storage

A secure browser cookie associates the checkout with your browser for 30 days. Download tokens are stored as hashes and expire after 24 hours. Short-lived hashed IP identifiers limit abuse. This site includes no analytics or advertising cookies.

Accounts and reading progress

When you sign in by email, we store your verified email, a randomly generated account identifier and an expiring, hashed session token. We link earlier purchases using the same verified checkout email address and save the last-read page per purchased edition. A private guest-access cookie lets you read purchases without registering. Sign-in links expire after 15 minutes; account and guest sessions expire after 30 days. Signing out removes all account and guest grants on this device.

Retention and your rights

We process your order reference, purchased language edition, purchase email address, amount, currency and payment status to perform the contract, provide the file and offer support. The private admin area uses a necessary session cookie valid for eight hours. Its visitor overview displays aggregated Cloudflare network statistics without adding visitor tracking or analytics cookies. Required accounting records and associated order data are retained for ten years from the end of the relevant financial year where required by law. Other data and support correspondence are kept only while needed to handle your request, unresolved claims or legal obligations. Expired technical records are regularly reviewed and removed. Cloudflare provides hosting and file storage; Stripe processes payments through Managed Payments. These providers may also process data outside Switzerland and the EEA. Their privacy notices describe recipients, countries and safeguards. For privacy matters, access, correction or deletion requests, contact Claudius Vinzens at [email protected]. Legal retention duties may prevent immediate deletion.