If you're looking for one that's reaonably long, but won't let you set it down, then I would highly recomend
Wicked: The life and Times of the Wicked Witch of the West. It centers around the life and times of (you guessed it) Elphaba, the Wicked Witch of the West in
The Wonderful Wizard of Oz. It explores her early life, her friends, and just how she ended up so damn "evil." Oanst has read it too if I'm not mistaken, so you can ask him if you don't believe me.