THE GOODMANWave Theory

Legal

Privacy

Last updated September 2026

In plain English

We collect your name and email so we can deliver what you bought and answer you. We keep the mailing list ourselves. We never sell, rent or share it. You can ask us to delete you at any time and we will.

What we collect

Your name, email address, and — if you give it — a phone number for the list. Payment details are handled by the payment provider and never reach us.

Why

To deliver your books, to answer your questions, and to send occasional letters if you asked for them. Nothing else.

Your choices

Every letter has an unsubscribe link. You may ask us for a copy of what we hold on you, ask us to correct it, or ask us to delete it. Write to us and we will act on it.

Cookies

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The list

One letter, when there is something to say

Charlie wrote to his students. We do the same: a new plate, a chart worth looking at, a note when a book is finished. No schedule, no sequence, no selling to you every Tuesday. Leave when you like.

We keep the list ourselves. It is never sold, rented or shared.