Wicked: The Life and Times of the Wicked Witch of the West (Wicked Years, #1)

by Gregory Maguire

“You are thinking!” Elphaba cried. Galinda raised herself to her elbows at the enthusiasm in her roomie’s voice. “I am about to sleep, because this is profoundly boring to me,” Galinda said, but Elphaba was grinning from ear to ear.