Hodder Children's Books Secret Seven: The Secret Seven Complete Collection (1-16)

The Secret Seven are a group of friends who meet in a shed and solve some startling mysteries. The Secret Seven Society consists of Peter, his sister Janet, and their friends Jack, Colin, George, Pam and Barbara. Although not an official member of the Secret Seven, Peter and Janet's golden spaniel Scamper also attends meetings. After all, he can be trusted not to give away any secrets to Jack's interfering sister Susie! The children meet in a shed with "S.S." on the door. Admission is by password only and badges must be worn. Peter, as head of the society, makes jolly well sure that everyone complies with the rules!