Chitty Chitty Bang Bang trilogy (Frank Cottrell Boyce)

Down on their luck, the Tooting family buys an old camper van and begins repairing it, but after installing an engine that once belonged to an extraordinary car, they are off to find other original parts, pursued by a sinister man who wants Chitty for himself.

When Big Ben takes off like a rocket after the World Cup, it takes a visit to the moon and the help of Chitty Chitty Bang Bang's previous owners, the Pott family, to save Chitty and Little Harry.