The Grimmerie inWickedis revealed to be an ancient spellbook full of Ozian magic that very few can understand.
This gives viewers a justifiable reason why she can read The Grimmerie and cast magic throughoutWicked.
Wicked adapts the Broadway musical into a two-part film, following the unlikely friendship between Elphaba, born with green skin, and Glinda, a popular aristocrat, in the Land of Oz. As they navigate their contrasting paths, they evolve into Glinda the Good and the Wicked Witch of the West.