The Truly Terrible Mistake (Penelope Perfect, Bk. 4)

Penelope Kingston has never, ever done poorly on a test - until now. After this Truly Terrible Mistake, Penelope needs to make sure that she gets absolutely perfect grades from now on in every subject, even her dreaded drama class.

Luckily, Penelope is very good at organizing, so she decides that she can be the director of the upcoming play. But can she handle Joanna, the naughtiest girl in class?

One thing's for sure: Penelope Kingston didn't get to be excellent at most things by being a quitter.