The Secret Seven are siblings Peter and Janet, and Jack, Barbara, Pam, Colin and George. Together they are The Secret Seven - ready to solve any mystery, any time - in Enid Blyton's classic series of 15 mystery novels.
In book seven, the Secret Seven have a fantastic new hiding place, but somebody else has been using it too. Whoever it is going there at night, the gang are going to put a stop it.
They are determined to catch the cheeky intruder, whatever it takes.
First published in 1955, this edition contains the original text and is unillustrated.