Last updated: July 06, 2026
DataField.Dev ("we," "our," or "us") operates the website datafield.dev. This Privacy Policy explains how we collect, use, and protect information when you visit our site.
We do not require you to create an account or provide personal information to access our textbooks. However, we may collect the following:
We use the following types of cookies:
We use Google AdSense (including Auto ads) to display advertisements on our site. Google and its partners may use cookies and similar technologies to serve personalized ads based on your prior visits to this and other websites, or non-personalized ads based on the content of the page and your general location.
For visitors in the European Economic Area, the United Kingdom, and Switzerland, we use a Google-certified consent management platform — Google's consent message — to obtain your consent before personalized advertising cookies are set, consistent with Google Consent Mode. You can change or withdraw your choice at any time using the consent controls presented on the site.
You can also opt out of personalized advertising by visiting Google's Ads Settings. Alternatively, you can opt out of third-party vendor cookies by visiting the Network Advertising Initiative opt-out page.
We may use Google Analytics to understand how visitors interact with our site. Google Analytics collects information such as how often users visit the site, what pages they visit, and what other sites they used prior to coming to our site. We use this information solely to improve the site. Google Analytics collects the IP address assigned to you on the date you visit the site, but we do not combine this with other data we hold.
Some pages — particularly chapter "Further Reading" sections and bibliographies — contain affiliate links to books on Amazon. As an Amazon Associate, DataField.Dev earns from qualifying purchases made through these links, at no additional cost to you. These links are marked rel="sponsored" and help support the free textbooks on this site. We only link to titles cited in our educational content; an affiliate relationship does not influence which works we reference.
We use collected information to:
We do not sell, trade, or otherwise transfer your personal information to third parties. Information may be shared with:
Your theme preference is stored in your browser's local storage until you clear it; your advertising and analytics consent choice is recorded by Google's consent management platform. We do not maintain server-side databases of user information. Analytics data is retained according to Google's standard retention policies.
You have the right to:
Our site is educational in nature and does not knowingly collect personal information from children under 13. Our content is designed for a general audience including students at the college level and above.
We may update this Privacy Policy from time to time. Changes will be reflected on this page with an updated "Last updated" date. Your continued use of the site after changes constitutes acceptance of the updated policy.
If you have questions about this Privacy Policy, please reach out through our About page.