The Wicked Years4 books in series
Wicked Publisher's Summary
Elphaba is born with green skin, a precocious mind, and a talent for magic. An outcast throughout her childhood in Munchkinland, she finally begins to feel as though she fits in when she enters the University in the Emerald City. While she hones her skills, she discovers that Oz isn't the Utopia it seems. She sets out to protect its unwanted creatures, becoming known as the Wicked Witch along the way.
Narrator John McDonough draws you in to Maguire's magical world of witches and talking animals, making it possible to believe in a land somewhere over the rainbow.