Privacy

This website

The site does not create customer accounts or collect payment details. No analytics scripts or tracking cookies are added by this version. Search and filtering run in your browser. Worksheet notes are not submitted or saved automatically.

Payments and downloads

Buy Now buttons open Stripe-hosted checkout. Stripe handles the payment details you enter under its privacy policy. The payment link’s existing completion settings handle download delivery. Full paid ebooks and their private download URLs are not included in this site’s public files.

Newsletter

Substack handles newsletter signup, subscriptions, and reading under its own policies. The optional embedded signup form loads only when you choose to load it.

Hosting and external services

Cloudflare may process technical information, including IP addresses and request logs, to serve and protect the site. External services have their own privacy practices.

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Last updated October 13, 2026.