Diego Rossi wrote:
And that is the terrible part of the item. As it is a woundros item it can be crafted by people that don't know the spell.
"Craft Wondrous Item, creator must be able to cast the spell contained in the page"
I'm pretty sure this stipulation in the creation description implies that you need to have the spell to make it, so a Wizard/Sorcerer combo makes sense, and the Wizard can just buy the scrolls to sell back higher to the overpowered Sorcerer.