The Inventor's Apprentice is a real-life Club Penguin franchise book by the author, Tracy West. It is the second Pick Your Path adventure book.
The book has no correct plot to it due to the fact that it is a Pick Your Path book. The story starts off when you are playing a game of Mancala with your friend when you get a postcard saying you won a contest. You follow a riddle and find Gary's Workshop.
Gary wears a yellow tie instead of a brown one in this book.
The book title is parody of The Sorcerer's Apprentice.
If you flip all the pages super fast, the animation on the upper-left corner will look like a movement of a screwdriver, and the bottom right hand corner is with Gary flying off in his jetpack, but ends up losing it.