Privacy Policy

The site runs on Cloudflare Workers. Every request passes through Cloudflare’s network, and Cloudflare processes the usual request metadata as the hosting provider: your IP address, your browser’s user agent, and the time of the request. That handling is covered by Cloudflare’s privacy policy.

The site itself reads exactly one thing out of a request: the two-letter country code that Cloudflare attaches as CF-IPCountry. It decides which Amazon store the buy links point to, and whether the analytics tag described below is loaded at all. We never read your IP address, and we keep no logs of our own.

The site uses Google Analytics 4 to count page views. The only event we send is page_view, carrying the address of the page and its title. Google Analytics adds what it derives on its own, including an approximate location from your IP address and basic device information, and it stores a _ga cookie in your browser so that repeat visits can be recognized. The data is processed by Google LLC in the United States. See how Google uses information from sites that use its services.

The tag is not loaded at all for visitors in the EU, the EEA, or the United Kingdom, nor for connections arriving over Tor or from a country that cannot be determined. Nothing is measured and no _ga cookie is set. We chose this over a consent banner deliberately: not measuring is easier to get right than asking for consent, recording it, and honoring its withdrawal.

Note that this decision rests on a country guessed from your IP address, so a VPN or a trip abroad will move you to the wrong side of it.

Everywhere else, you can opt out with the Google Analytics Opt-out Browser Add-on.

The site also uses Cloudflare Web Analytics, which Cloudflare’s network inserts into the page on its way to you. It measures page performance through the browser’s Performance API and reports the path you visited, the referring address, your country, device type, browser, and operating system, along with Core Web Vitals and page load times.

This one runs everywhere, including the regions where Google Analytics is switched off. It sets no cookies and does not fingerprint your browser, and Cloudflare states that it does not collect or use visitors’ personal data, so there is nothing here to consent to and nothing to opt out of.

The only cookie this site can set is _ga, placed by Google Analytics wherever that tag is loaded. It is a first-party cookie holding a randomly generated identifier — not your name, not your address.

One entry may be kept in local storage: if you dismiss the notice offering another language edition, we remember that so it stays dismissed. The entry is a single expiry timestamp under a fixed key. It carries no identifier, records neither which language you were offered nor which page you were on, is never sent anywhere, and clears itself after six months.

Nothing else is kept on your device. The site uses no session storage and no cookies of its own. Clearing site data in your browser removes everything.

If you are in the EU, the EEA, or the United Kingdom, the GDPR gives you the right to ask what personal data is held about you, to have it corrected or erased, to receive a copy of it, to object to how it is processed, and to complain to your national supervisory authority.

In practice there is very little for us to act on. Analytics is switched off in those regions, we keep no logs, and we hold no record that identifies you. If you are somewhere else and want data held by Google Analytics removed, ask us and we will pass the request on.

Buy links point to Amazon, BOOTH, and Leanpub. Other links lead to GitHub, X, Bluesky, and our blog on Hashnode. None of them carry affiliate tags or tracking parameters — an Amazon link is nothing more than the store domain for your country and the identifier of the book. Once you follow a link, the privacy policy of that site applies instead of this one.

Questions about this policy, and requests about your data, go through the form below. It is a Google Form, so what you write there is stored by Google.