Discount is valid for up to 70% off select eBook purchases from this page and select lists. Offer valid from September 26, 2014 at 12:00 AM EST through September 29, 2014 at 11:59 PM EST. This offer is not valid in conjunction with any other offer or promotion and cannot be used to adjust amount paid on previous purchases. Discounts cannot be applied nor the discount value refunded once a purchase is complete. We reserve the right to change or end this offer at any time without notice.