From the website:
* This offer is only good for one standard 20-page 8" x 11" custom-cover photo book per household. Coupon dispersal ends at 11:59 p.m. PST Friday, November 14, 2008. Free photo book must be redeemed by 11:59 p.m. PST Sunday, November 16, 2008. Offer does not include customary shipping and handling changes or additional pages. Offer applies only to mail-order delivery to U.S. customers. Offer cannot be combined with other coupon codes. Coupon cannot be resold or otherwise transferred and is void on the earlier of redemption or the offer end date.
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So if you read this in time, go check it out!