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. The Secret Seven have a brand-new meeting place, but somebody else has been using it too. How dare they? Whoever they are, they'll return at night - and the gang are determined to put a stop to it. They'll catch the cheeky intruder, whatever it takes ...