Aftershock

In the sixth book of this middle grade sci-fi series, a teen-turned-alien gains high-voltage powers to zap her enemies, if they don't get her first.

Up until her thirteenth birthday, Toni Douglas's only superpower was shopping. But on the very day she's celebrating becoming a teenager with a trip to the mall, she gets arrested for shoplifting! As if! Then a gang of kids come after her for no apparent reason. Good thing a bolt of lightning zaps those jerks before they could get their hands...