Privacy Policy

Last updated: August 25, 2026

This page explains what data System Design Unboxed (by LeXTrem Books) collects and what we do with it. Short version: we collect the minimum needed to send you the free sample and deliver your purchase, and we never sell your data.

1. What we collect

• Free sample: the email address you enter. Consent to receive occasional updates is optional and checked by default off.
• Purchases: your name, email and order details. Payments are processed by Lemon Squeezy, and the minimum order info needed to deliver your download is shared with us.

2. How we use it

• To email you the free sample.
• To provide your download link and receipt after a purchase.
• To send you occasional updates about new releases — only if you gave consent. You can unsubscribe with one click from any email.

3. What we don't do

• We don't sell or rent your data to anyone.
• We don't build advertising profiles.
• We don't require consent for the sample to work — it's optional.

4. Third parties

• Lemon Squeezy — payment processing and order handling.
• Brevo — email delivery, only when you give consent for updates.
• Hosting provider — serves the site and the download files.

5. Cookies

We don't set marketing or tracking cookies. Lemon Squeezy may set strictly necessary cookies during checkout for the purchase to work.

6. Your rights

You can unsubscribe at any time via the link in any email, or ask us to delete your data. To request deletion or a copy of your data, contact us below.

7. Contact

Email: info@lextrem.com. We usually reply within 2 business days.