What are the terms to redeem the free photobook of my choice using my Pass voucher worth the intended value?

The free product is applicable for one (1) photobook up to the value of your Pass voucher. If the value of the photobook ordered is below your voucher value, you will not be entitled to a refund on the differences. If the photobook ordered is valued above your voucher value, additional charges for the price difference are applicable and can be paid during checkout. The voucher is applicable for photobooks, additional pages, upgrades, and accessories.