The Keystone of Evil: The Ayerth Chronicles

Elora Avon is assigned to The Citadel, a training ground for young knights and the greatest fortress in the country of Arden. She initially believes that her biggest challenge will be gaining the acceptance of her male counterparts, but the most boring assignment for many young knights is about to get far too exciting and very dangerous. A raid by an enemy as part of what seems to be a straightforward threat proves to have a deeper and more sinister provocation. The attack will send Elora and her friends on a quest to uncover the reason for a devastating raid fourteen years earlier by the same foes. In their quest they will encounter new friends and allies as they race to recover and destroy an ancient artifact, The Keystone of Evil.