THE FAMOUS FIVE AND THE Z-RAYS
A holiday in the Lake District should have meant quiet picnics, fresh air and cycling expeditions. But when a newly invented scientific device falls into the wrong hands, with possibly disastrous consequences, the Five are soon involved. First ruthless burglars and then fanatical spies from a mysterious foreign power, determined to obtain the invention, and it is up to the Five to stop them at all costs. . .