Code Name Cassandra (Missing)

Code Name Cassandra (Missing) by Meg Cabot. paperback edition. ISBN: 9780689860928.

The Lightning Girl has lost her powers! Or at least thats what Jess would like the media and the government to think. All Jess wants is to be left alone - well, except by Rob, the hottest senior in detention. But it doesnt look like Jess is going to get her wish - especially not while shes stuck working at a summer camp for musically gifted kids who are more than interested in their councellors psychic abilities. And, when the father of a missing girl shows up, begging her to find his daughter, Jess knows that she cant refuse. Now the feds are on her trail again, as well as one very angry stepdad, whod like to see Lightning Girl ...dead.