The final title in the series of eight Marvin Redpost stories.
Marvin is amazed when he goes home with Casey Happleton one day after school and discovers that she lives in an old fire station. But that's not all that surprises him. Casey has a secret she wants to share - a crystal with super magical powers. A crystal that makes all your wishes come true. Can it be real or can she be casting her own spell on him?
