Lumen Libri

Legal & Transparency · Updated September 2026

Privacy Policy & Cookie Disclosure

How Lumen Libri protects your privacy, stores your reading progress locally, and uses cookies and Google AdSense advertising services.

1. Introduction & Scope

Welcome to Lumen Libri (https://lumenlibri.com/). We respect your privacy and are committed to transparent data practices. This Privacy Policy explains how information is handled when you visit our digital reading room and study guides, how browser local storage works, and how third-party advertising partners—specifically Google AdSense—use cookies.

2. Local Browser Storage (Your Bookshelf & Reading Progress)

Lumen Libri uses your web browser’s localStorage mechanism to save:

  • Your current reading page and progress percentage for each book in the collection.
  • Your custom shelf assignments (Currently Reading, Want to Read, Finished) and any custom books or reading passages you add via the "Add a book" dialog.
  • Your cookie consent preferences.

This bookshelf data resides exclusively on your own device and is never transmitted to our servers or sold to third parties. You may clear it at any time by clearing your browser’s site data.

3. Google AdSense & Third-Party Advertising Cookies

To support the free publication and maintenance of our digital library and study guides, Lumen Libri participates in the Google AdSense program (Publisher ID: pub-6512698924789848 / Client ID: ca-pub-6512698924789848).

  • Third-Party Vendors: Third-party vendors, including Google, use cookies to serve ads based on a user’s prior visits to this website or other websites on the internet.
  • Google Advertising Cookies (DART / DoubleClick): Google’s use of advertising cookies enables it and its partners to serve advertisements to our visitors based on their visit to lumenlibri.com and/or other sites on the Internet.
  • Opting Out of Personalized Advertising: Users may opt out of personalized advertising at any time by visiting Google’s Ads Settings (https://adssettings.google.com). Alternatively, you can opt out of a third-party vendor’s use of cookies for personalized advertising by visiting www.aboutads.info/choices or www.youronlinechoices.eu.
  • How Google Uses Data: To learn more about how Google collects and processes data when you use partner sites, please review Google’s official policy at https://policies.google.com/technologies/partner-sites and https://policies.google.com/technologies/ads.

4. Server Logs & Security

Like all standard web hosting and CDN providers (such as Cloudflare), our infrastructure automatically records basic, non-identifying technical request metadata (such as anonymized IP addresses, browser user-agent strings, referring pages, and timestamps) strictly for network security, abuse prevention, and aggregate traffic delivery.

5. Your Rights Under GDPR (EEA/UK) and CCPA (California)

If you reside in the European Economic Area (EEA), the United Kingdom, Turkey (KVKK), or California, you have the right to request information about data processing, withdraw cookie consent at any time, and opt out of interest-based advertising. You can reset your cookie preference on Lumen Libri by clearing lumen-libri-cookie-consent-v1 in your browser storage or adjusting your browser’s cookie settings.

6. Contact Information

If you have any questions or concerns regarding this Privacy Policy or our data practices, please contact our Privacy & Editorial Officer at privacy@lumenlibri.com or via our Contact Page.