In this graphic novel, Shaggy’s Aunt Isabelle is a judge for the Chocolate Art Show.  It is being ruined by an unknown phantom.  She enlists Shaggy and friends to help solve this mystery.  They search for clues and eventually set a trap to catch the one responsible for stopping the show.  As in most graphic novels, many details are added in the illustrations.  One point that is disturbing to me is that Scooby is shown to enjoy eating chocolate.  Chocolate can be toxic to dogs depending on the type of chocolate and the size of the dog.  A young reader may get the idea it is okay to feed chocolate to their pet.