MARTIN MOONE AND HIS IMAGINARY FRIEND SEAN MURPHY ARE BACK! THE LAUGHS ARE BIGGER AND THE ADVENTURES SILLIER.
It's lean times at the Moone Boy household and all Martin wants is a Game Boy. If he wants a Game Boy though, he's going to have to work for it. So his imaginary friend, Sean, suggests he get a job...
After failing to find work as a stable boy, cowboy, or homeboy, the Moone boy instead becomes Boyle's main butcher boy. But Francie Feeley's Fabulous Fishatorium across the road is luring all their customers away. Convinced something fishy is afoot, Martin and Sean decide to go on an undercover mission to discover the secrets of the mysterious fish factory. But can Agent M double-O N E get to the bottom of Feeley's slippery schemes without ending up sleeping with the fishes himself?