Mr Mack's inventing career has got off to a bad start - he's beenarrested!It's up to Jimmy, Robbie, Kayla and Rover the wonder-dog to:- Rescue Mr Mack from prison- Avoid the orphan catchers- Save the world from an army of stroppy slugsWill they succeed? There's only one way to find out. Please note this is a second hand book. Format: Hardback Condition: Good used condition. Ex library.