Aha! Gotcha: Paradoxes to Puzzle and Delight

Once we receive your order we will ship within three business days.

For standard shipping we use USPS Media Mail, which typically takes 4 to 7 business days. For expedited shipping we offer USPS Priority Mail, which typically takes 1-3 days. Shipping can take longer to Hawaii or Alaska, or during holidays. We ship from California.

The shipping costs are based on the number of items in your order and will be included in your payment. We reserve the right to change the shipping fees if we find the actual cost very different from what you were charged during checkout. We will contact you if that is the case.

Returns and Refunds

If a book or item is damaged in shipment, or if the book or item shipped is other than what was described, the customer must contact us within ten (10) days of receipt to claim a refund. For books and other items damaged in shipment, shipped in error or other than what was described, we will refund the customer all charges. However, we are not responsible for loss due to "porch pirates" or similar mail theft.

If an online order is cancelled by us as unavailable to ship, the customer will be given a full refund of all charges.

If the customer decides to cancel an online order before shipment has occurred, the customer will be given a refund of all charges, less a 20% restocking fee based on the price of the book or item.

If the customer decides to cancel an online order after shipment has occurred, the customer must contact us within ten (10) days of receipt to request a refund, and ship the book or item back to us at the customer's expense. Once we receive the book or item and confirm it was received in the same condition as it was shipped, we will issue a refund less a 20% restocking fee based on the price of the book or item.

We do not ship internationally or to US territories.