Summer of Spies

Belle is brilliant with computers, but she has spent so much of the summer online that the holidays are slipping by without her. Everything changes when she and her brother find a spy satellite sitting on the roof of their garden shed. Belle must put her technical know-how to use in the real world, and quickly. Meanwhile, her father is working on a secret invention that he refuses to explain, even to his own children. When he finally needs their help, the children are drawn into a fast-moving adventure that is only just getting started.