Trouble on the Hidden Moon

Jack Coughlin's magical stone from Anron sends another Morse Code message. This time the dits and dahs spell G-R-U-N, the name of the evil creature they all thought was dead. Jack, his brother Collin and their friend Danny return to outer space to help their Anronite friends-Karna and Nidar- and discover Grun is very much alive and is determined to have The Hidden Moon for his own. The battles to save Anron take them from the dark side of the moon to the dangerous Bogg on Planet IXX where they must win the freedom to go back home again.