The Hidden Temple — Catherine Cooke

Now the commander of the Queen's armies, Kyellan prepares the royal city for an oncoming attack, while Briana faces rebellion from her own priestesses. In the aftermath of the war with the wizards, danger threatens the newly reborn Wizards' College. Everyone must face their worst enemies in the final battle, including a disembodied, scheming Shape-Changer spirit. This sword and sorcery romance is the third and final book in the Mask of the Wizard trilogy.