The great train mystery / adapted by David Lewman ; based on the screenplay "Krabby Patty no more" written by Casey Alexander ... [et al.] ; illustrated by the Artifact Group.
At head of title: Nickelodeon, SpongeBob Squarepants. "Based on the TV series SpongeBob SquarePants created by Stephen Hillenburg as seen on Nickelodeon"--T.p. verso.
Summary:
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.
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