The Mad Scientist's Secret (Amazing Adventure Puzzle Thrillers) - 9463

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.
ASIN: 0590494384
VSKU: 56JR8Z0022QB_ns
Condition: Acceptable