Elemental trilogy (Sherry Thomas)

After spending the summer away from each other, Titus and Iolanthe (still disguised as Archer Fairfax) are eager to return to Eton College to resume their training to fight the Bane. Although no longer bound to Titus by blood oath, Iolanthe is more committed than ever to fulfilling her destiny--especially with the agents of Atlantis quickly closing in. Soon after arriving at school, though, Titus makes a shocking discovery--one that throws into question...