Privacy Policy
Last updated 2026-05-29
This policy describes what information StudyGuide ("we," "us") collects and how we use it. We try to keep it short and plain.
What we collect
- Email addresses you voluntarily submit through our signup or contact forms.
- Purchase information (email, order ID, textbook purchased) sent to us by Lemon Squeezy when you buy a PDF study guide. We do not see your credit card details — Lemon Squeezy handles all payment processing as merchant of record.
- Basic, aggregate analytics (page views, country, referrer) once analytics is enabled. We do not use cross-site tracking cookies.
- Form contents you submit on the Contact page, processed by Formspree on our behalf.
What we do with it
- Deliver the PDF study guide you purchased — either immediately (for Available now products) or when the PDF ships (for Pre-orders).
- Send transactional emails: order confirmation, download link, delivery notification for pre-orders.
- Reply to inquiries you send through Contact.
- Understand which guides are most useful so we know what to write next.
Payment processing
All payments are processed by Lemon Squeezy as the merchant of record. We do not store, see, or have access to your full credit card number, CVV, or billing address — only the order ID, the email you used at checkout, and which product you bought. Lemon Squeezy's privacy policy applies to your payment data.
What we don't do
- Sell your email address to anyone.
- Share your information with publishers, advertisers, or data brokers.
- Use behavioral retargeting or third-party ad pixels.
Affiliate links
Some textbook pages include affiliate links to retailers (e.g., Amazon, AbeBooks). If you purchase through one of those links we may earn a small commission at no additional cost to you. We disclose these placements with visible labels.
Your choices
Unsubscribe from notifications at any time via the unsubscribe link in any email we send. To request deletion of your information, email v@nnbrn.com.
Contact
Questions about this policy? Email v@nnbrn.com or use the contact form.