Five and the Smuggler's Code

The Famous Five are back as a new group of kids head to Smuggler’s Top to crack their second mystery.
Maddy, Fran, Tom and Gilbert can’t wait for their holiday with Professor George at Kirrin Cottage. But when they arrive, they realise George is missing.
They follow her to an old house called Smuggler’s Top, full of secret tunnels and ancient hiding places, where they discover a master criminal who must be stopped at all costs.