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
Enid Blyton lifelong favourite of Gillian's and spawned the Secret series. The following year Blyton released her first book in the Circus series and her initial book in the Amelia Jane series, "Naughty Amelia Jane!" According to Gillian the main character was based on a large handmade doll given to her by her mother on her third birthday. During the 1940s Blyton became a prolific author, her success enhanced by her "marketing, publicity and branding that was far ahead of its time". In 1940 Blyton published two books – "Three Boys and a Circus" and "Children of Kidillin" – under the pseudonym