The case of the invisible dog
The case of the invisible dog
The case of the invisible dog
The case of the invisible dog
The McGurk Organization's four young detectives match wits with a nine-year-old scientific genius to unravel the mystery of the "invisible dog."
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Featured Series
10 primary booksMcGurk Mystery is a 10-book series with 10 primary works first released in 1974 with contributions by E.W. Hildick and Lisl Weil.
