Boom!

An explosive and hilarious adventure from Mark Haddon, acclaimed author of THE CURIOUS INCIDENT OF THE DOG IN THE NIGHT-TIME. From the moment that Jim and his best friend Charlie bug the staffroom and overhear two of their teachers speaking in a secret language, they know there's an adventure on its way. But what does "spudvetch" mean, and why do Mr Kidd's eyes flicker with fluorescent blue light when Charlie says it to him? Perhaps Kidd and Pearce are bank robbers talking in code. Perhaps they're spies. Perhaps they're aliens.