The Island of Peril

Department Z must stop the Nazis from deploying a deadly chemical weapon during World War II—from the author who sold eighty million books worldwide.
On a top-secret island, the Germans are perfecting a paralyzing gas—one that could disable an entire infantry troop, a crew of a ship, or the pilots of aircraft.
With the looming threat of this noxious gas, it's up to Department Z to find this mysterious island where the gas is being manufactured and steal the formula to prevent the Germans from using it as their ultimate weapon.