What is the literary device used in the book wicked by Sara Shepard?

In "Wicked" by Sara Shepard, one prominent literary device is foreshadowing. The author subtly hints at future events and character developments through various clues and details, creating suspense and intrigue. This technique enhances the overall narrative by building anticipation for the unfolding plot twists and the darker themes present in the story. Additionally, Shepard employs multiple perspectives, which allows readers to see different facets of the characters and their motivations, deepening the complexity of the narrative.