*Offer valid through May 31, 2012 (11:59 p.m. local time). A 25% discount is applied toward your product total. Maximum discount is USD $150, GBP £95, EUR €115, CAD $150, or AUD $150 off product total. Valid for printed books only. This offer is good for one-time use, and cannot be combined with volume discounts, other promotional codes, gift cards, or used for adjustments on previous orders.

There also seems to be another promotion also going on, same time, same discount %. Save 25% with the promo code HELLOSUMMER until May 31, 2012