Tom’s got a secret – and it’s out of this world!
At the bottom of the Tuttle family’s garden rises a huge hedge, as tall and as solid as the wall of a castle. Behind it live the Grimleys, but what they’re trying to hide no one knows. Then one evening Tom Tuttle hears an eerie wailing. What sort of creature could make such a noise – a noise that stops when Tom’s sisters sing? And if he uncovers the truth, will anyone believe him?