Key, The Guardians of Time 3 - Marianne Curley

The Order of Chaos begins its final and devastating assault on the Named in a desperate bid to annihilate them and gain absolute control of all the realms. The Named are in trouble. Not only must they find the precious lost key to unlock their ancient treasury of weapons, but there is a traitor in their midst. Suspicion is making them weaker, as the prophecy predicted, and they desperately need new hope.