The second exciting adventure of boy-inventor Ollie Spark and his adorable best friend, Gasket the dog!

Machines, mysteries and mayhem await Ollie as he travels to a food festival on a far-flung island. An encounter with a Grand Duchess leads Ollie on an undercover spying mission, that is his most exciting and dangerous yet!

"Hugely enjoyable reading" - LoveReading, praise for the Ollie Spark series

"Exciting adventure . . . and a great friendship at its core" - BookWagon, praise for the Ollie Spark series

"A thrilling new series" - Waterstones