Gillian Cross & Alan Snow 
Ollie Spark and the Exploding Popcorn Mystery [EPUB ebook] 

Machines, mysteries and mayhem – this must be a case for OLLIE SPARK!Ollie Spark has his biggest adventure yet, when he travels to a fancy food festival on a far-flung island!There are tasty treats galore – but the festival’s guest of honour, a grand Duchess, is acting very suspiciously. What is she hiding? Ollie embarks on an undercover mission involving spying, secret recipes and lots of noodles . . .It’s up to Ollie and his lovable dog Gasket to uncover the truth, and save the island before disaster strikes!