Fortress - Twin Sword Prophecy, #3

Three years have passed since the fall of Gemini. All is quiet in the world of Malgar, until the newly built village of Fortress is violently attacked, and one of Kainan's dragon riders, Morgana, disappears. Just before he loses all contact with her, Morgana tells her dragon, Rohan, that it is the Sorceress, and daughter of the evil Gemini, Analise. Kainan and Arweyn must now defend their city, and keep her and her evil creatures from destroying it.
However, not everything goes to plan, and the King and Queen of Malgar are in for a shock when they discover where Analise has been hiding, and what or whom - her secret weapon is.