I just read the fine print:
*Offer valid through March 4, 2013 (11:59 p.m. local time). Valid for printed books only. A 25% discount is applied toward your product total with no minimum order. Offer valid for first-time customers only. Maximum discount is USD $100, GBP £65, EUR €75, CAD $100, or AUD $100 off product total. 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.
First time customers only!! Try ordering in someone else's name if you have ordered before ... I am REALLY SORRY !!! I should have read the fine print first. I guess I got a little too excited.