Secret Seven Adventure (1950) – While the Seven are playing Red Indians in a wood, Peter and Colin encounter a man who has just stolen Lady Lucy Thomas’s pearl necklace from Milton Manor. The search for the thief leads the children to a circus field and lions.
The Secret Seven consists of Peter (the society’s head), Janet (Peter’s sister), Pam, Barbara, Jack, Colin and George. Jack’s sister Susie and her best friend Binkie make occasional appearances in the books; they hate the Secret Seven and delight in playing tricks designed to humiliate them, although this is partly fuelled by their almost obsessive desire to belong to the society.
Unlike most other Blyton series, this one takes place during the school term time because the characters go to day schools.
Continuing Blyton’s series, Pamela Butchart wrote two new adventures in the series, adding elements of horror.