Offer is valid for select eBook purchases from this list. Offer valid from May 10, 2018 at 12:00 AM EST through May 17, 2018 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. Rakuten Kobo Inc. reserves the right to change or cancel this offer at any time without notice.