A thrilling detective story littered with wild and wonderful inventions from the award-winning author of PIG-HEART BOY and NOUGHTS AND CROSSES.

Beans calls her dad 'Gadgetman' because of the weird and wonderful gadgets he comes up with - everything from exploding biscuits to Spy Kits. But when Gadgetman accidentally invents a device that could be used to steal millions of pounds, the wrong people find out and Gadgetman is kidnapped!With the help of her friends - and her special Gadgetman Spy Kit - Beans is determined to track down the kidnappers and rescue her dad. But can she find Gadgetman before he is forced to hand over the details of his invention...?