From the moment that Jimbo and his best friend Charlie bug the staff room and overhear two of their teachers speaking to each other in a secret language, they know that nothing is as it seems. But what does "e;spudvetch"e; mean, and why do Mr. Kidd's eyes flicker with fluroscent blue light when Charlie says it to him? Perhaps the teachers are bank robbers speaking in code; perhaps they're spies, or aliens. Whatever they are, Jimbo and Charlie know that there is a big adventure on its way: a nuclear-powered, one-hundred-tonne one, with reclining seats and a buffet car. And as it gains speed and begins to spin out of control, it can only end one way with a BOOM!From the Hardcover edition.