The Last Laugh (The Hardy Boys)

The Last Laugh is a Hardy Boys novel in the Casefiles series. It was published in 1990.

Plot
The famous publisher of Zenith Comics, Barry Johns, is kidnapped from the San Diego comic-book convention by characters Human Dreadnought and Flame Fiend, observed by the Hardys. Joe and Frank think it was a publicity stunt, but then a kidnapper destroys a valuable art collection.