I know that this is at the last minute but if you're shopping on Lulu.com in the next fifty-something hours, take advantage of this code1
Quoting Mr Lulu himself:
"Enter coupon code TREASUREUK305 at checkout and receive 20% off your order. The maximum savings for this coupon is £100. Offer good towards print costs only - shipping and tax amounts are excluded. You can only use the code once per account, and you can't use this coupon in combination with other coupon codes. This great offer ends on 17, January 2011 at 11:59 PM"