MARVIN REDPOST 8 : A MAGIC CRYSTAL

Marvin Redpost is just a normal kid...or is he?Marvin has a girlfriend - not a real girlfriend, just a girl who is a friend. And Casey Happleton is no ordinary girl. She lives in an old firehouse, and she has a magic crystal! And she's offered to share the crystal with Marvin. Could the crystal really be magic? Or is Casey putting her own spell on Marvin?