Sure, the glass castle floating over Evan’s head's a little unsettling, but that’s the least of his worries. With each step inside the Dungeon of Dreadful Dreams, he must battle against his own worst nightmares. One after the other, bull sharks and sea sirens come at him … he must remember they are only illusions pulled from his imagination by shadow-like hands. If only the vengeful dragon circling above were also an illusion and didn’t have his mind set on destroying the one person who can control him — Emrys. In the tower made of glass, the great wizard sleeps in an eternal slumber, and Evan’s uncertain whether he can save him. Especially, now that Emrys’ former student, the Lady of the Lake, has joined forces with the cunning immortal Alamaz. Together, they have already stolen the Dragon’s Egg, but their greed doesn’t end there. The Siren’s Pearl calls to them, and that means only one thing … Atlantis is in trouble. Travel with Evan, Claire, and Dunkle, as well as a few more unlikely heroes, across the realm of Medieval Legends, through the Ancient Isle of Avalon, inside the Dungeon of Dreadful Dreams, and be there when Atlantis rises once again.