Are you up for a thrilling adventure?
With the end of summer approaching, the Mystery Kids take a trip to Heron Island. While walking along the beach, they are surprised to find a notebook wedged behind a rock.
Why is it written in code? Is anyone hiding in the castle? And what do the two bald men want?
Set in 1950's Britain, this adventure story will suit anyone who enjoys Nancy Drew, the Hardy Boys or the Famous Five.
