Privacy Policy

Last updated: 26 March 2026

This Privacy Policy explains how Leszek Lisowski ("we", "us", "our") collects and uses personal data when you visit https://leszeklisowski.com and its subpages (the "Site"), including sections related to books, gamedev content, and video materials, or when you subscribe to receive emails from us.

1) Data Controller

The controller of your personal data is:

Leszek Lisowski
Email: leszek@leszeklisowski.com

2) What Data We Collect

Depending on how you interact with the Site, we may process:

• Email address – when you subscribe to updates
• Subscription metadata – such as date/time of signup, source page (e.g., workbook, books, gamedev content), and basic technical data provided by the email service
• Email engagement data – such as delivery status, opens, and clicks (may be limited if tracking is disabled)
• Technical data – such as IP address, browser type, device type, and basic server logs used for security and performance

We do not intentionally collect sensitive personal data.

3) How We Use Your Data

We use your data to:

Email communication

• send updates about books, workbooks, and related content
• share new releases, editions, and selected gamedev materials (articles, videos, insights)

Site operation

• ensure the Site functions correctly
• maintain performance and security
• prevent abuse or unauthorized access

Improvement

• understand how users interact with content (e.g., which pages or topics are visited)

Compliance

• meet legal obligations where applicable

4) Legal Basis (GDPR)

Where applicable, we process data based on:

• Consent (Art. 6(1)(a)) – for email subscriptions
• Legitimate interest (Art. 6(1)(f)) – for operating, securing, and improving the Site
• Legal obligation (Art. 6(1)(c)) – when required by law

You can withdraw consent at any time.

5) Data Retention

• Email and subscription data are stored until you unsubscribe
• Minimal data may be retained for:
  • compliance
  • security
  • suppression lists (to ensure you are not contacted again after unsubscribing)

6) Email Communication

If you subscribe, you may receive:

• updates about books and workbooks
• new content (articles, videos, insights related to gamedev and production)
• occasional announcements

Each email includes an unsubscribe link.

7) Service Providers

We use external providers to operate the Site and communications:

• MailerLite – email delivery and subscriber management

These providers process data on our behalf under appropriate agreements.

8) International Transfers

Some providers may process data outside the European Economic Area (EEA).

Where this occurs, appropriate safeguards are used (e.g., Standard Contractual Clauses or equivalent legal mechanisms).

9) Your Rights

Depending on your location, you may have the right to:

• access your data
• correct inaccurate data
• request deletion
• restrict or object to processing
• request data portability
• withdraw consent at any time

To exercise your rights:
leszek@leszeklisowski.com

If you are in the EEA/UK, you can also contact your local supervisory authority.

10) Cookies and Similar Technologies

The Site may use essential cookies required for:

• basic functionality
• security
• performance

If additional analytics or marketing tools are introduced, this policy will be updated accordingly.

11) External Links

The Site may include links to third-party platforms such as:

• Amazon (book pages)
• YouTube (video content)
• LinkedIn (other materials)
• Others (materials related to the site content)

We are not responsible for the privacy practices of those services. Please review their policies separately.

12) Changes to This Policy

This Privacy Policy may be updated periodically.
The "Last updated" date reflects the latest revision.

13) Contact

For any privacy-related questions:

Email: leszek@leszeklisowski.com