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 nine, a girl has mysteriously run away from home and her parents are frantic with worry.

Can the Secret Seven follow the clues and catch up with the girl, or will Susie, Jack's troublesome little sister get in the way?

First published in 1957, this edition contains the original text and is unillustrated.