Shipping & Returns


Z-Twist Books ships orders Mondays, Wednesdays, and Fridays.

We are happy to ship anywhere in the world.

Within the USA, we offer free shipping by USPS Media Mail. The USPS estimates 3-9 business days to ship packages by Media Mail. Shipping by USPS Priority Mail is available for an additional fee, depending on weight and distance. The USPS estimates 1-3 days to ship by Priority Mail.  As of October 2020, the USPS has instituted changes that may considerably slow down delivery, so there is chance that your package will take considerably longer to arrive.

We reserve the right to substitute similar shipping methods, such as FedEx ground.

We charge actual postage for international orders.

Up to three elementary books can fit into a flat rate envelope. If you are planning to get all of the Elementary Set, it costs less in postage to get them all at once than to buy them piecemeal. Also, the box protects the books better from getting banged up than the envelopes do.

Please note that customers outside of the US may be charged additional customs fees/duties to import their merchandise.  The shipping rates you are charged at checkout do not include these fees.  These are taxes levied by the destination countries, and Z-Twist Books has no control over them.


Your satisfaction with our products is our highest priority. If you are not satisfied for any reason, simply return the books in saleable condition within 35 days of your order date and we will issue you a refund. Please note that, once shipped, shipping charges are non-refundable.

Return merchandise to:

Z-Twist Books
3312 Woodview Dr.
Lafayette, CA 94549

Please include a copy of your packing slip with your return so we can tell where to send the refund.

Errors and Damage

We are only human. Errors in shipping and damage to merchandise do occasionally occur. Claims for errors or damage must be made within seven days of receipt of the merchandise.