The Mad Scientist's Secret (Amazing Adventure Puzzle Thrillers)
Readers must find the mad scientist and stop him from smuggling his secret formula for sludge--a tasteless substance that will turn anyone who eats it into a zombie--into school cafeterias around the world
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The reader must find the mad scientist, Dr. XXX, and stop him from smuggling his secret formula for sludge--a tasteless substance that will turn anyone who eats it into a zombie--into school cafeterias around the world. Original.
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