In addition to the 25% off lulu sale (coupon code: CYBERMAY305), I have cut the price on the books by $1 each. So the effective prices should be as shown below. The prices can now be measured in terms of how much you'd pay for lunch -- bring a sandwich to work tomorrow instead of going to the deli and you've virtually financed the softcover right there (depending on where you live).
Softcover: $14 with my discount ($15 normally) Price would effectively be $10.50 with lulu discount
Hardcover: $24 with my discount ($25 normally) Price would effectively be $18.00 with lulu discount
I will probably keep my $1 discount going for a month or so after the lulu sale, but obviously the lulu sale is where the real discount lies -- my $1 off is just to add some additional kicker.
If you're buying 5 copies of the same book at lulu, they give an additional discount of 5%. So if you're buying for a gaming group it's better to have one person order the copies for everyone instead of having everyone buy separately.
Also note that this doesn't reduce shipping costs, only the cost of a printed product.
You can only use the coupon code ONCE, so your first order should contain everything you want.
Edit: the lulu sale ends on May 31.