"While Scooby-Doo and the gang visit a tourist town, the Mystery Machine vanished in a patch of thick fog. Other vehicles have gone missing as well. Mystery Inc. is on the case! But can they unravel the mystery of the Mist Monster, or will they get lost in the fog?"--Provided by publisher.
Scooby-Doo! comic chapter books.
Fog -- Juvenile fiction.
Monsters -- Juvenile fiction.
Scooby-Doo (Fictitious character) -- Juvenile fiction.