Contact

Corrections

Reference entries carry a revision date. If you have found an error, write to [email protected] with the entry title and the specific claim in question.

Partnerships

For partnerships, including content partnerships and sponsorships, please contact our agency TheoryDigital. The emails you might be communicating with include [email protected] and [email protected].

Orders

Workbooks are delivered as immediate downloads. Physical kits ship worldwide from the studio. Order questions: [email protected].

Permissions

Cheat sheets may be printed and used in teaching with attribution. For anything else, write to [email protected].