Books by Brandon Mull

War has come to the dragon sanctuaries of the world and nowhere is the danger more intense than at Wyrmroost. After a humiliating defeat at the hands of Kendra and Seth, Celebrant, King of Dragons, prepares to unleash his fury and take control of his native preserve. Armed with information from a new ally Ronodin, the dark unicorn Celebrant seeks a legendary talisman the dominion stone. However, the powerful stone is protected by a cursed castle. Upon entering the castle fortress, an unyielding power strips all magical beings of their power and forces Celebrant to take his human avatar form. Kendra and Seth must enter the cursed castle as well. The race is on. Will the two young caretakers rally enough support from the creatures of Wyrmroost against the greatest threat the magical community has faced in ages? Can they foil Celebrant's plan and beat him to the mighty dominion stone? Or will all hope be shattered by the wrath of the Dragon King?

After Jason succeeds in finding a way back to Lyrian, he's immediately in more danger than ever. Meanwhile, Rachel and the others have made their own progress--as well as discovered new enemies. As the group ultimately rejoins, they strive to convince their most needed ally to join the war and form a rebellion strong enough to triumph against the emperor.