Meg Cabot 
Vanished: When Lightning Strikes & Code Name Cassandra 

When Lightning Strikes When lightning strikes there can only be trouble – as Jessica Mastriani finds out when she is caught in a thunderstorm. But this trouble with a capital T – this trouble is serious. Because somehow, on that long walk home, Jess acquired a new talent. She can find missing people – dead or alive Code Name Cassandra Since developing her psychic powers, Jess has discovered that not everyone wants to be found. And, right now, Jess is one of them. Because some very important people want to speak to her about her newfound powers – people who know just how a good power can be used for evil – and the wrong decision will lead Jess into deadly danger