Secret Agents Four — Donald J. Sobol

Four boys and a mission

Ken and his pals are in for one wild summer! Things are usually pretty exciting with Orv Davy around. You never know what his next invention will be (or where to hide from it)! But this vacation won't be like any other. The boys are going to become Secret Agents.

Cobra, a top-secret ring of enemy spies, has threatened their city with a sinister memory drug. The Government is on to their plan...but they need Orv to build a spy-catching machine. Will Cobra succeed in taking over an entire city? Not with the Secret Agents Four on the case!