The Final Test (The Secret of the Unicorn Queen, Book 3)

When Mardock, the evil wizard, put a spell on handsome Prince Laric and his courageous warriors, he also invented a magical antidote that could only work during a lunar eclipse. Now, at last, that time is at hand in the enchanted kingdom of Arren. But someone must sneak into the wizard's underground laboratory and seize the magic formula ... that someone is Sheila.Sheila must bring back the formula for a magical antidote from an evil wizard's underground lab, but if she doesn't receive help from Dr. Reit, back on earth, she and the entire world of Arren may face extinction