Theory of Constraints on Audio

Order processing may take up to 3 business days, provided the order information is complete and accurate.

Completion of orders is subject to successful payment processing.

Even though we will try its utmost to successfully process an order, we reserves the right to delay or cancel any order that lacks information or presents payment difficulties.

Please note that product prices and availability are subject to change.

Return policy:

• All book sales are final - no refunds, no exchanges.
• Orders which have not been processed can be cancelled at no service charge.
• Products (other than books) that have not been used (opened, installed or accessed) can be returned or exchanged at a service charge.
• After 10 days, all sales are final, no refunds, no exchanges.