Vanished: When Lightning Strikes / Code Name Cassandra by Meg Cabot

A gift…or a curse?
Jessica Mastriani has never liked attention. All she wants is to make it to high school graduation like any ordinary girl. But when Jess is struck by lightning, she becomes anything but ordinary: suddenly she has the ability to locate missing children.
Now Jess is getting noticed in all the wrong ways and by all the wrong people. The media is obsessed with her and her story. The FBI is tapping her phone. And what’s going on with sexy senior Rob? Soon Jess learns the hard way that not everyone who is lost wants to be found….
With no one to trust, it's up to Jess to decide what to do with her new power—before it’s decided for her.