Very little. This site sets no cookies, runs no advertising and only the cookie-free analytics described below, and has no forms apart from the email sign-up described below. Our hosting provider (Microsoft Azure Static Web Apps) keeps standard server logs, such as IP addresses and requested pages, to run and protect the service.
Pages load fonts from Google Fonts, so your browser connects to Google's servers, which receive your IP address. See Google's privacy policy.
Some pages show our YouTube videos. Nothing is loaded from YouTube until you press play: the page shows our own preview image. When you press play, the video loads from YouTube's privacy-enhanced mode (youtube-nocookie.com), so your browser connects to Google's servers, and YouTube's own privacy policy and cookie policy apply to the player.
If you sign up for free-book alerts, your email address (and any exam you choose) is sent to Kit (kit.com), which runs our mailing list. Kit stores it in the United States under the UK Extension to the EU-US Data Privacy Framework and the UK International Data Transfer Addendum. We use it only to email you about Ultra Transcenders books and free Kindle days. You confirm by email before anything is sent, and every email has an unsubscribe link. The sign-up forms on this site load nothing from Kit until you press Subscribe.
We count visits with Umami Cloud (umami.is), a privacy-focused analytics service that sets no cookies and, by its own account, collects no personal data. It records which pages are viewed, the referring site, browser, device type and country, plus clicks on the Amazon buttons and email sign-ups, so we can see which pages help readers. If your browser sends Do Not Track, nothing is counted.
"Buy" buttons take you to Amazon.co.uk or Amazon.com. We are a participant in the Amazon Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. As an Amazon Associate I earn from qualifying purchases. The price you pay is the same. Once you are on Amazon, Amazon's own privacy notice and cookie policy apply, and Amazon may use cookies to record that you arrived from this site.