Supernova - Marissa Meyer, Macmillan Children's Books

You can't wear a mask forever. Love and Anarchy won't allow it. With their alter egos at war, their allies at each other's throats and their feelings for one another growing, Nova and Adrian battle to keep their secret identities under wraps as their greatest fears are realized. Anarchy is once again heading for Gatlon City, and this time it may not survive. Supernova is Marissa Meyer's fearless finale to the Renegade trilogy - you won't want to miss this.