The Verruca Bazooka

Aliens are coming... to get up your nose! They don't want our oil. They don't want our water. They don't want our Brussels sprouts. (Actually, neither do we.) They just want our snot! Jack loves to invent things - but even he couldn't make this up. After all, who could believe that an ordinary nine-year-old boy would get recruited into a secret agency to help stop an alien invasion?