The Secret Seven short story titled "The Secret of the Old Mill". It followed an earlier short story, "At Seaside Cottage", which introduced the leading characters Peter and Janet prior to the formation of the society. There followed a further five short stories and fifteen full-length books. The Secret Seven appeared in seven short stories by Blyton, including a mini-novella explaining how the society was formed. These were left uncollected until 1997, when all but "At Seaside Cottage" were published in a single volume by Hodder Children's Books under the title of "Secret Seven: Short Story Collection". Scamper – Janet and Peter's pet
The Secret Series (Enid Blyton) in portraits that shine mysteriously, lights that shine in tower rooms, despite being locked tight. It seems that there are unknown people who do not want them to stay in the castle. On occasion, a strange tingling effect is felt by them, and strange coloured lights seem to rise from the ground, and it seems to be due to a strange metal (possibly radioactive) that mysterious men are mining for unknown reasons. Paul invites his friends to Baronia once again, and they are camped near a secret airfield where new Baronian aircraft are being tested with the help of Captain