Breath of Dragons — Barbara Kloss

After Prince Alaric's death, Daria and Alex set off in search of the legendary box of the Pandors'. The box is famed to hold a secret of power -- one strong enough to overcome Lord Eris and the shield of power he stole from Valdon. Daria doesn't know where the box is hidden, but she can't ignore the silent urging, beckoning her to the land of Pendel -- the land her mother, Aurora Pandor, was from. Time is running out. Lord Eris's army of shadowguard vastly outnumber Valdon's forces, and if Daria doesn't find the box in time, Valdon will need reinforcements from the other territories to survive. But those territories will not hand over their armies willingly, not without Daria's hand in marriage. And there is another, older power rising, one that hasn't been seen in centuries -- one thought lost since the days of Galahad: the dragons.