Mainspring Press welcomes purchase orders from qualified non-profit libraries and educational institutions.

To qualify, you must provide a verifiable tax-exempt or business license number, a physical location for your business or institution (no post-office box numbers, please), and a working phone number and e-mail address.

For prepaid orders, we accept Visa, MasterCard, PayPal, or checks and money orders payable in U.S. dollars at a U.S. bank.

Foreign orders must be pre-paid in full unless credit has been arranged in advance. Customers outside the U.S. should contact us in advance for shipping charges. Foreign customers must supply a VAT or other tax-exempt number to avoid paying customs fees.

Mainspring Press reserves the right to decline credit at its sole discretion.


Please review our return policy carefully before ordering. By placing an order, you certify that you understand and accept these terms.


Compound interest of 5% per month will accrue past-due balances. Payments not received within 120 calendar days of our shipping date will be referred to a collection agency.

Site © 2016 by Mainspring Press, LLC. Additional content copyright as noted. All rights are reserved.





As of April 1, 2016, Mainspring Press is a purely direct-to-consumer business and does not offer discounts to distributors or resellers.


We accept purchase orders from qualified libraries and educational institutions. We do not offer institutional discounts at this time.

Terms are 30-days net from date of invoice. Institutional purchase orders must include a purchase-order number or other authorization number; name and department of purchaser; and full contact information. Returns must be postmarked within 60 calendar days of our shipping date, and must be in unused condition, to qualify for a refund.

Mainspring Press titles may no longer be ordered through distributors.