The Secret Seven are Peter and his sister Janet, Jack, Colin, George, Pam and Barbara. They meet every holiday in the shed at the bottom of Peter and Janet's garden - and solve mysteries, and eat lots of delicious food. But no one can enter the shed without whispering the secret password! There are 15 Secret Seven novels, and a collection of short stories.
There are strange happenings at Torling Castle. Someone is hiding out in the ruined tower, making the resident jackdaws very unsettled.
Who is it - and what do they want The Secret Seven are on to it ...