Privacy
You can read and download the free chapters without an account.
Guest checkout and your books
When checkout is available, Stripe handles the payment and supplies the purchase contact email. This site keeps purchase status, the book edition, format choices and download access records so it can confirm payment and provide your books.
A secure browser cookie identifies your guest session. Keep your recovery code private: it can restore access in another browser. The page does not save recovery codes in browser storage.
Purchase and recovery email
When email delivery is configured, the purchase contact address is used for purchase and recovery messages. These are service messages, not a marketing subscription. An email recovery code is limited to its order; receiving a message does not replace the payment and access checks.
Browser storage and technical records
Your browser keeps checkout and purchase-email retry references, plus the waiting period before another email request. These do not give access to your books.
This site does not use advertising pixels or analytics services. Hosting, payment and email providers may process technical records to deliver and secure their services.
Questions about a purchase
Complete books are not available to buy yet. You can read Chapter 1 of each book free from the books. Purchase support is currently unavailable here. See purchase support for information about earlier purchases. Never send a recovery code or card details.