The Lost Queen — Mark Miller

Zandria and Olena continue their adventures in the land of Empyrean. Zandria discovers a magical crystal that may be the clue to finding their mother, who has been missing the past six years. Zandria and some new friends set out on a quest to recover the other crystals. The wicked Carnivale Chaotica ringleader, Raymond Shaydaway, wants the crystals for his own evil ends and will stop at nothing to take them from Zandria. Now Zandria must solve the mystery of the Lost Queen if she has any hope of finding her mother.