Title: The great train mystery
Description: When Mr. Krabs gives SpongeBob the only key to the vault holding the Krabby Patty's secret recipe, SpongeBob and Patrick must keep it safe, until it is stolen by a passenger on their train.
Subjects: Marine animals, Theft, Juvenile fiction, Sponges, SpongeBob SquarePants (Fictitious character), Formulas, recipes, Railroad trains, Locks and keys, Fiction, Trains, Friendship