One of my friend already asked if I could take two books in order to pay less.
Of course, the central question here is whether piling rewards onto a single backer
does in fact save shipping costs, and is even
possible beyond the multibook tiers added after the fact.
(I can adapt to whatever method Hiveworks can best deal with - up the single pledge and sort out the extra rewards later, create multiple KS accounts, or order the addendum from the Hiveworks store after the KS campaign - as long as Hiveworks
picks one before the campaign's over ...)