About the book
Danny Dingle, our favourite AMAZING super-inventor, is back and this time he's joining the SCOUTS! (Everyone knows that stands for Spy Club Only for Ultra-Terrific Spies, don't they?) Faced with the perilous prospect of a camping trip to 'Sunny' Scotland, can Danny and Percy save the day? And more importantly, could Danny be building the coolest super-sonic submarine EVER?