Rita Morse and the Treacherous Traitor (Rita Morse, Book 2‪)‬

Learning that she's a Guardian, meant to protect the world from evil and injustice, has only been the start of Rita Morse's problems. Now the teen-hating Shadow Regime has returned, with its sights now set on kidnapping and enslaving Rita's classmates. Rita's new powers might not be enough to protect them, and worse, there may be a traitor working in her midst.